16981840

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{2687}}^1$

素因数の和:2779

約数の個数: 40

約数和(自身を含む): 39997440

約数和(自身を除く): 23015600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 2687, 3160, 5374, 6320, 10748, 13435, 21496, 26870, 42992, 53740, 107480, 212273, 214960, 424546, 849092, 1061365, 1698184, 2122730, 3396368, 4245460, 8490920, 16981840]

約数ペア:

[(1, 16981840), (2, 8490920), (4, 4245460), (5, 3396368), (8, 2122730), (10, 1698184), (16, 1061365), (20, 849092), (40, 424546), (79, 214960), (80, 212273), (158, 107480), (316, 53740), (395, 42992), (632, 26870), (790, 21496), (1264, 13435), (1580, 10748), (2687, 6320), (3160, 5374)]