21158216

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{191}}^1\times {\mathrm{227}}^1$

素因数の和:485

約数の個数: 32

約数和(自身を含む): 40711680

約数和(自身を除く): 19553464

約数列:

[1, 2, 4, 8, 61, 122, 191, 227, 244, 382, 454, 488, 764, 908, 1528, 1816, 11651, 13847, 23302, 27694, 43357, 46604, 55388, 86714, 93208, 110776, 173428, 346856, 2644777, 5289554, 10579108, 21158216]

約数ペア:

[(1, 21158216), (2, 10579108), (4, 5289554), (8, 2644777), (61, 346856), (122, 173428), (191, 110776), (227, 93208), (244, 86714), (382, 55388), (454, 46604), (488, 43357), (764, 27694), (908, 23302), (1528, 13847), (1816, 11651)]