21821940

素因数分解:

$2^2\times 3^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{251}}^1$

素因数の和:299

約数の個数: 192

約数和(自身を含む): 81285120

約数和(自身を除く): 59463180

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 23, 27, 28, 30, 35, 36, 42, 45, 46, 54, 60, 63, 69, 70, 84, 90, 92, 105, 108, 115, 126, 135, 138, 140, 161, 180, 189, 207, 210, 230, 251, 252, 270, 276, 315, 322, 345, 378, 414, 420, 460, 483, 502, 540, 621, 630, 644, 690, 753, 756, 805, 828, 945, 966, 1004, 1035, 1242, 1255, 1260, 1380, 1449, 1506, 1610, 1757, 1890, 1932, 2070, 2259, 2415, 2484, 2510, 2898, 3012, 3105, 3220, 3514, 3765, 3780, 4140, 4347, 4518, 4830, 5020, 5271, 5773, 5796, 6210, 6777, 7028, 7245, 7530, 8694, 8785, 9036, 9660, 10542, 11295, 11546, 12420, 13554, 14490, 15060, 15813, 17319, 17388, 17570, 21084, 21735, 22590, 23092, 26355, 27108, 28865, 28980, 31626, 33885, 34638, 35140, 40411, 43470, 45180, 47439, 51957, 52710, 57730, 63252, 67770, 69276, 79065, 80822, 86595, 86940, 94878, 103914, 105420, 115460, 121233, 135540, 155871, 158130, 161644, 173190, 189756, 202055, 207828, 237195, 242466, 259785, 311742, 316260, 346380, 363699, 404110, 474390, 484932, 519570, 606165, 623484, 727398, 779355, 808220, 948780, 1039140, 1091097, 1212330, 1454796, 1558710, 1818495, 2182194, 2424660, 3117420, 3636990, 4364388, 5455485, 7273980, 10910970, 21821940]

約数ペア:

[(1, 21821940), (2, 10910970), (3, 7273980), (4, 5455485), (5, 4364388), (6, 3636990), (7, 3117420), (9, 2424660), (10, 2182194), (12, 1818495), (14, 1558710), (15, 1454796), (18, 1212330), (20, 1091097), (21, 1039140), (23, 948780), (27, 808220), (28, 779355), (30, 727398), (35, 623484), (36, 606165), (42, 519570), (45, 484932), (46, 474390), (54, 404110), (60, 363699), (63, 346380), (69, 316260), (70, 311742), (84, 259785), (90, 242466), (92, 237195), (105, 207828), (108, 202055), (115, 189756), (126, 173190), (135, 161644), (138, 158130), (140, 155871), (161, 135540), (180, 121233), (189, 115460), (207, 105420), (210, 103914), (230, 94878), (251, 86940), (252, 86595), (270, 80822), (276, 79065), (315, 69276), (322, 67770), (345, 63252), (378, 57730), (414, 52710), (420, 51957), (460, 47439), (483, 45180), (502, 43470), (540, 40411), (621, 35140), (630, 34638), (644, 33885), (690, 31626), (753, 28980), (756, 28865), (805, 27108), (828, 26355), (945, 23092), (966, 22590), (1004, 21735), (1035, 21084), (1242, 17570), (1255, 17388), (1260, 17319), (1380, 15813), (1449, 15060), (1506, 14490), (1610, 13554), (1757, 12420), (1890, 11546), (1932, 11295), (2070, 10542), (2259, 9660), (2415, 9036), (2484, 8785), (2510, 8694), (2898, 7530), (3012, 7245), (3105, 7028), (3220, 6777), (3514, 6210), (3765, 5796), (3780, 5773), (4140, 5271), (4347, 5020), (4518, 4830)]