21780856

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{223}}^1\times {\mathrm{421}}^1$

素因数の和:679

約数の個数: 32

約数和(自身を含む): 42537600

約数和(自身を除く): 20756744

約数列:

[1, 2, 4, 8, 29, 58, 116, 223, 232, 421, 446, 842, 892, 1684, 1784, 3368, 6467, 12209, 12934, 24418, 25868, 48836, 51736, 93883, 97672, 187766, 375532, 751064, 2722607, 5445214, 10890428, 21780856]

約数ペア:

[(1, 21780856), (2, 10890428), (4, 5445214), (8, 2722607), (29, 751064), (58, 375532), (116, 187766), (223, 97672), (232, 93883), (421, 51736), (446, 48836), (842, 25868), (892, 24418), (1684, 12934), (1784, 12209), (3368, 6467)]