257954920

素因数分解:

$2^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{19483}}^1$

素因数の和:19825

約数の個数: 32

約数和(自身を含む): 582181920

約数和(自身を除く): 324227000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 331, 662, 1324, 1655, 2648, 3310, 6620, 13240, 19483, 38966, 77932, 97415, 155864, 194830, 389660, 779320, 6448873, 12897746, 25795492, 32244365, 51590984, 64488730, 128977460, 257954920]

約数ペア:

[(1, 257954920), (2, 128977460), (4, 64488730), (5, 51590984), (8, 32244365), (10, 25795492), (20, 12897746), (40, 6448873), (331, 779320), (662, 389660), (1324, 194830), (1655, 155864), (2648, 97415), (3310, 77932), (6620, 38966), (13240, 19483)]