20377720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1597}}^1$

素因数の和:1648

約数の個数: 64

約数和(自身を含む): 51775200

約数和(自身を除く): 31397480

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, 1160, 1276, 1595, 1597, 2552, 3190, 3194, 6380, 6388, 7985, 12760, 12776, 15970, 17567, 31940, 35134, 46313, 63880, 70268, 87835, 92626, 140536, 175670, 185252, 231565, 351340, 370504, 463130, 509443, 702680, 926260, 1018886, 1852520, 2037772, 2547215, 4075544, 5094430, 10188860, 20377720]

約数ペア:

[(1, 20377720), (2, 10188860), (4, 5094430), (5, 4075544), (8, 2547215), (10, 2037772), (11, 1852520), (20, 1018886), (22, 926260), (29, 702680), (40, 509443), (44, 463130), (55, 370504), (58, 351340), (88, 231565), (110, 185252), (116, 175670), (145, 140536), (220, 92626), (232, 87835), (290, 70268), (319, 63880), (440, 46313), (580, 35134), (638, 31940), (1160, 17567), (1276, 15970), (1595, 12776), (1597, 12760), (2552, 7985), (3190, 6388), (3194, 6380)]