17978620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1151}}^1$

素因数の和:1242

約数の個数: 48

約数和(自身を含む): 41803776

約数和(自身を除く): 23825156

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 71, 110, 142, 220, 284, 355, 710, 781, 1151, 1420, 1562, 2302, 3124, 3905, 4604, 5755, 7810, 11510, 12661, 15620, 23020, 25322, 50644, 63305, 81721, 126610, 163442, 253220, 326884, 408605, 817210, 898931, 1634420, 1797862, 3595724, 4494655, 8989310, 17978620]

約数ペア:

[(1, 17978620), (2, 8989310), (4, 4494655), (5, 3595724), (10, 1797862), (11, 1634420), (20, 898931), (22, 817210), (44, 408605), (55, 326884), (71, 253220), (110, 163442), (142, 126610), (220, 81721), (284, 63305), (355, 50644), (710, 25322), (781, 23020), (1151, 15620), (1420, 12661), (1562, 11510), (2302, 7810), (3124, 5755), (3905, 4604)]