21731580

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{251}}^1$

素因数の和:316

約数の個数: 144

約数和(自身を含む): 73198944

約数和(自身を除く): 51467364

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 37, 39, 45, 52, 60, 65, 74, 78, 90, 111, 117, 130, 148, 156, 180, 185, 195, 222, 234, 251, 260, 333, 370, 390, 444, 468, 481, 502, 555, 585, 666, 740, 753, 780, 962, 1004, 1110, 1170, 1255, 1332, 1443, 1506, 1665, 1924, 2220, 2259, 2340, 2405, 2510, 2886, 3012, 3263, 3330, 3765, 4329, 4518, 4810, 5020, 5772, 6526, 6660, 7215, 7530, 8658, 9036, 9287, 9620, 9789, 11295, 13052, 14430, 15060, 16315, 17316, 18574, 19578, 21645, 22590, 27861, 28860, 29367, 32630, 37148, 39156, 43290, 45180, 46435, 48945, 55722, 58734, 65260, 83583, 86580, 92870, 97890, 111444, 117468, 120731, 139305, 146835, 167166, 185740, 195780, 241462, 278610, 293670, 334332, 362193, 417915, 482924, 557220, 587340, 603655, 724386, 835830, 1086579, 1207310, 1448772, 1671660, 1810965, 2173158, 2414620, 3621930, 4346316, 5432895, 7243860, 10865790, 21731580]

約数ペア:

[(1, 21731580), (2, 10865790), (3, 7243860), (4, 5432895), (5, 4346316), (6, 3621930), (9, 2414620), (10, 2173158), (12, 1810965), (13, 1671660), (15, 1448772), (18, 1207310), (20, 1086579), (26, 835830), (30, 724386), (36, 603655), (37, 587340), (39, 557220), (45, 482924), (52, 417915), (60, 362193), (65, 334332), (74, 293670), (78, 278610), (90, 241462), (111, 195780), (117, 185740), (130, 167166), (148, 146835), (156, 139305), (180, 120731), (185, 117468), (195, 111444), (222, 97890), (234, 92870), (251, 86580), (260, 83583), (333, 65260), (370, 58734), (390, 55722), (444, 48945), (468, 46435), (481, 45180), (502, 43290), (555, 39156), (585, 37148), (666, 32630), (740, 29367), (753, 28860), (780, 27861), (962, 22590), (1004, 21645), (1110, 19578), (1170, 18574), (1255, 17316), (1332, 16315), (1443, 15060), (1506, 14430), (1665, 13052), (1924, 11295), (2220, 9789), (2259, 9620), (2340, 9287), (2405, 9036), (2510, 8658), (2886, 7530), (3012, 7215), (3263, 6660), (3330, 6526), (3765, 5772), (4329, 5020), (4518, 4810)]