12721720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{997}}^1$

素因数の和:1048

約数の個数: 64

約数和(自身を含む): 32335200

約数和(自身を除く): 19613480

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 29, 40, 44, 55, 58, 88, 110, 116, 145, 220, 232, 290, 319, 440, 580, 638, 997, 1160, 1276, 1595, 1994, 2552, 3190, 3988, 4985, 6380, 7976, 9970, 10967, 12760, 19940, 21934, 28913, 39880, 43868, 54835, 57826, 87736, 109670, 115652, 144565, 219340, 231304, 289130, 318043, 438680, 578260, 636086, 1156520, 1272172, 1590215, 2544344, 3180430, 6360860, 12721720]

約数ペア:

[(1, 12721720), (2, 6360860), (4, 3180430), (5, 2544344), (8, 1590215), (10, 1272172), (11, 1156520), (20, 636086), (22, 578260), (29, 438680), (40, 318043), (44, 289130), (55, 231304), (58, 219340), (88, 144565), (110, 115652), (116, 109670), (145, 87736), (220, 57826), (232, 54835), (290, 43868), (319, 39880), (440, 28913), (580, 21934), (638, 19940), (997, 12760), (1160, 10967), (1276, 9970), (1595, 7976), (1994, 6380), (2552, 4985), (3190, 3988)]