81911340

素因数分解:

$2^2\times 3^2\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{251}}^1$

素因数の和:317

約数の個数: 216

約数和(自身を含む): 298024272

約数和(自身を除く): 216112932

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 37, 42, 45, 49, 60, 63, 70, 74, 84, 90, 98, 105, 111, 126, 140, 147, 148, 180, 185, 196, 210, 222, 245, 251, 252, 259, 294, 315, 333, 370, 420, 441, 444, 490, 502, 518, 555, 588, 630, 666, 735, 740, 753, 777, 882, 980, 1004, 1036, 1110, 1255, 1260, 1295, 1332, 1470, 1506, 1554, 1665, 1757, 1764, 1813, 2205, 2220, 2259, 2331, 2510, 2590, 2940, 3012, 3108, 3330, 3514, 3626, 3765, 3885, 4410, 4518, 4662, 5020, 5180, 5271, 5439, 6660, 7028, 7252, 7530, 7770, 8785, 8820, 9036, 9065, 9287, 9324, 10542, 10878, 11295, 11655, 12299, 15060, 15540, 15813, 16317, 17570, 18130, 18574, 21084, 21756, 22590, 23310, 24598, 26355, 27195, 27861, 31626, 32634, 35140, 36260, 36897, 37148, 45180, 46435, 46620, 49196, 52710, 54390, 55722, 61495, 63252, 65009, 65268, 73794, 79065, 81585, 83583, 92870, 105420, 108780, 110691, 111444, 122990, 130018, 139305, 147588, 158130, 163170, 167166, 184485, 185740, 195027, 221382, 245980, 260036, 278610, 316260, 325045, 326340, 334332, 368970, 390054, 417915, 442764, 455063, 553455, 557220, 585081, 650090, 737940, 780108, 835830, 910126, 975135, 1106910, 1170162, 1300180, 1365189, 1671660, 1820252, 1950270, 2213820, 2275315, 2340324, 2730378, 2925405, 3900540, 4095567, 4550630, 5460756, 5850810, 6825945, 8191134, 9101260, 11701620, 13651890, 16382268, 20477835, 27303780, 40955670, 81911340]

約数ペア:

[(1, 81911340), (2, 40955670), (3, 27303780), (4, 20477835), (5, 16382268), (6, 13651890), (7, 11701620), (9, 9101260), (10, 8191134), (12, 6825945), (14, 5850810), (15, 5460756), (18, 4550630), (20, 4095567), (21, 3900540), (28, 2925405), (30, 2730378), (35, 2340324), (36, 2275315), (37, 2213820), (42, 1950270), (45, 1820252), (49, 1671660), (60, 1365189), (63, 1300180), (70, 1170162), (74, 1106910), (84, 975135), (90, 910126), (98, 835830), (105, 780108), (111, 737940), (126, 650090), (140, 585081), (147, 557220), (148, 553455), (180, 455063), (185, 442764), (196, 417915), (210, 390054), (222, 368970), (245, 334332), (251, 326340), (252, 325045), (259, 316260), (294, 278610), (315, 260036), (333, 245980), (370, 221382), (420, 195027), (441, 185740), (444, 184485), (490, 167166), (502, 163170), (518, 158130), (555, 147588), (588, 139305), (630, 130018), (666, 122990), (735, 111444), (740, 110691), (753, 108780), (777, 105420), (882, 92870), (980, 83583), (1004, 81585), (1036, 79065), (1110, 73794), (1255, 65268), (1260, 65009), (1295, 63252), (1332, 61495), (1470, 55722), (1506, 54390), (1554, 52710), (1665, 49196), (1757, 46620), (1764, 46435), (1813, 45180), (2205, 37148), (2220, 36897), (2259, 36260), (2331, 35140), (2510, 32634), (2590, 31626), (2940, 27861), (3012, 27195), (3108, 26355), (3330, 24598), (3514, 23310), (3626, 22590), (3765, 21756), (3885, 21084), (4410, 18574), (4518, 18130), (4662, 17570), (5020, 16317), (5180, 15813), (5271, 15540), (5439, 15060), (6660, 12299), (7028, 11655), (7252, 11295), (7530, 10878), (7770, 10542), (8785, 9324), (8820, 9287), (9036, 9065)]