257688440

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{77617}}^1$

素因数の和:77711

約数の個数: 32

約数和(自身を含む): 586792080

約数和(自身を除く): 329103640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 77617, 155234, 310468, 388085, 620936, 776170, 1552340, 3104680, 6442211, 12884422, 25768844, 32211055, 51537688, 64422110, 128844220, 257688440]

約数ペア:

[(1, 257688440), (2, 128844220), (4, 64422110), (5, 51537688), (8, 32211055), (10, 25768844), (20, 12884422), (40, 6442211), (83, 3104680), (166, 1552340), (332, 776170), (415, 620936), (664, 388085), (830, 310468), (1660, 155234), (3320, 77617)]