688880

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:201

約数の個数: 40

約数和(自身を含む): 1636800

約数和(自身を除く): 947920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 109, 158, 218, 316, 395, 436, 545, 632, 790, 872, 1090, 1264, 1580, 1744, 2180, 3160, 4360, 6320, 8611, 8720, 17222, 34444, 43055, 68888, 86110, 137776, 172220, 344440, 688880]

約数ペア:

[(1, 688880), (2, 344440), (4, 172220), (5, 137776), (8, 86110), (10, 68888), (16, 43055), (20, 34444), (40, 17222), (79, 8720), (80, 8611), (109, 6320), (158, 4360), (218, 3160), (316, 2180), (395, 1744), (436, 1580), (545, 1264), (632, 1090), (790, 872)]