20581880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1613}}^1$

素因数の和:1664

約数の個数: 64

約数和(自身を含む): 52293600

約数和(自身を除く): 31711720

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, 1613, 2552, 3190, 3226, 6380, 6452, 8065, 12760, 12904, 16130, 17743, 32260, 35486, 46777, 64520, 70972, 88715, 93554, 141944, 177430, 187108, 233885, 354860, 374216, 467770, 514547, 709720, 935540, 1029094, 1871080, 2058188, 2572735, 4116376, 5145470, 10290940, 20581880]

約数ペア:

[(1, 20581880), (2, 10290940), (4, 5145470), (5, 4116376), (8, 2572735), (10, 2058188), (11, 1871080), (20, 1029094), (22, 935540), (29, 709720), (40, 514547), (44, 467770), (55, 374216), (58, 354860), (88, 233885), (110, 187108), (116, 177430), (145, 141944), (220, 93554), (232, 88715), (290, 70972), (319, 64520), (440, 46777), (580, 35486), (638, 32260), (1160, 17743), (1276, 16130), (1595, 12904), (1613, 12760), (2552, 8065), (3190, 6452), (3226, 6380)]