18690760

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{397}}^1$

素因数の和:526

約数の個数: 64

約数和(自身を含む): 46422720

約数和(自身を除く): 27731960

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 107, 110, 214, 220, 397, 428, 440, 535, 794, 856, 1070, 1177, 1588, 1985, 2140, 2354, 3176, 3970, 4280, 4367, 4708, 5885, 7940, 8734, 9416, 11770, 15880, 17468, 21835, 23540, 34936, 42479, 43670, 47080, 84958, 87340, 169916, 174680, 212395, 339832, 424790, 467269, 849580, 934538, 1699160, 1869076, 2336345, 3738152, 4672690, 9345380, 18690760]

約数ペア:

[(1, 18690760), (2, 9345380), (4, 4672690), (5, 3738152), (8, 2336345), (10, 1869076), (11, 1699160), (20, 934538), (22, 849580), (40, 467269), (44, 424790), (55, 339832), (88, 212395), (107, 174680), (110, 169916), (214, 87340), (220, 84958), (397, 47080), (428, 43670), (440, 42479), (535, 34936), (794, 23540), (856, 21835), (1070, 17468), (1177, 15880), (1588, 11770), (1985, 9416), (2140, 8734), (2354, 7940), (3176, 5885), (3970, 4708), (4280, 4367)]