21405840

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1129}}^1$

素因数の和:1224

約数の個数: 80

約数和(自身を含む): 67257600

約数和(自身を除く): 45851760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 79, 80, 120, 158, 237, 240, 316, 395, 474, 632, 790, 948, 1129, 1185, 1264, 1580, 1896, 2258, 2370, 3160, 3387, 3792, 4516, 4740, 5645, 6320, 6774, 9032, 9480, 11290, 13548, 16935, 18064, 18960, 22580, 27096, 33870, 45160, 54192, 67740, 89191, 90320, 135480, 178382, 267573, 270960, 356764, 445955, 535146, 713528, 891910, 1070292, 1337865, 1427056, 1783820, 2140584, 2675730, 3567640, 4281168, 5351460, 7135280, 10702920, 21405840]

約数ペア:

[(1, 21405840), (2, 10702920), (3, 7135280), (4, 5351460), (5, 4281168), (6, 3567640), (8, 2675730), (10, 2140584), (12, 1783820), (15, 1427056), (16, 1337865), (20, 1070292), (24, 891910), (30, 713528), (40, 535146), (48, 445955), (60, 356764), (79, 270960), (80, 267573), (120, 178382), (158, 135480), (237, 90320), (240, 89191), (316, 67740), (395, 54192), (474, 45160), (632, 33870), (790, 27096), (948, 22580), (1129, 18960), (1185, 18064), (1264, 16935), (1580, 13548), (1896, 11290), (2258, 9480), (2370, 9032), (3160, 6774), (3387, 6320), (3792, 5645), (4516, 4740)]