257665240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{920233}}^1$

素因数の和:920251

約数の個数: 32

約数和(自身を含む): 662568480

約数和(自身を除く): 404903240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 920233, 1840466, 3680932, 4601165, 6441631, 7361864, 9202330, 12883262, 18404660, 25766524, 32208155, 36809320, 51533048, 64416310, 128832620, 257665240]

約数ペア:

[(1, 257665240), (2, 128832620), (4, 64416310), (5, 51533048), (7, 36809320), (8, 32208155), (10, 25766524), (14, 18404660), (20, 12883262), (28, 9202330), (35, 7361864), (40, 6441631), (56, 4601165), (70, 3680932), (140, 1840466), (280, 920233)]