21117488

素因数分解:

$2^4\times 7^1\times {\mathrm{409}}^1\times {\mathrm{461}}^1$

素因数の和:885

約数の個数: 40

約数和(自身を含む): 46976160

約数和(自身を除く): 25858672

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 409, 461, 818, 922, 1636, 1844, 2863, 3227, 3272, 3688, 5726, 6454, 6544, 7376, 11452, 12908, 22904, 25816, 45808, 51632, 188549, 377098, 754196, 1319843, 1508392, 2639686, 3016784, 5279372, 10558744, 21117488]

約数ペア:

[(1, 21117488), (2, 10558744), (4, 5279372), (7, 3016784), (8, 2639686), (14, 1508392), (16, 1319843), (28, 754196), (56, 377098), (112, 188549), (409, 51632), (461, 45808), (818, 25816), (922, 22904), (1636, 12908), (1844, 11452), (2863, 7376), (3227, 6544), (3272, 6454), (3688, 5726)]