21556360

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{167}}^1\times {\mathrm{461}}^1$

素因数の和:646

約数の個数: 64

約数和(自身を含む): 55883520

約数和(自身を除く): 34327160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 167, 280, 334, 461, 668, 835, 922, 1169, 1336, 1670, 1844, 2305, 2338, 3227, 3340, 3688, 4610, 4676, 5845, 6454, 6680, 9220, 9352, 11690, 12908, 16135, 18440, 23380, 25816, 32270, 46760, 64540, 76987, 129080, 153974, 307948, 384935, 538909, 615896, 769870, 1077818, 1539740, 2155636, 2694545, 3079480, 4311272, 5389090, 10778180, 21556360]

約数ペア:

[(1, 21556360), (2, 10778180), (4, 5389090), (5, 4311272), (7, 3079480), (8, 2694545), (10, 2155636), (14, 1539740), (20, 1077818), (28, 769870), (35, 615896), (40, 538909), (56, 384935), (70, 307948), (140, 153974), (167, 129080), (280, 76987), (334, 64540), (461, 46760), (668, 32270), (835, 25816), (922, 23380), (1169, 18440), (1336, 16135), (1670, 12908), (1844, 11690), (2305, 9352), (2338, 9220), (3227, 6680), (3340, 6454), (3688, 5845), (4610, 4676)]