21428840

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31513}}^1$

素因数の和:31541

約数の個数: 32

約数和(自身を含む): 51052680

約数和(自身を除く): 29623840

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31513, 63026, 126052, 157565, 252104, 315130, 535721, 630260, 1071442, 1260520, 2142884, 2678605, 4285768, 5357210, 10714420, 21428840]

約数ペア:

[(1, 21428840), (2, 10714420), (4, 5357210), (5, 4285768), (8, 2678605), (10, 2142884), (17, 1260520), (20, 1071442), (34, 630260), (40, 535721), (68, 315130), (85, 252104), (136, 157565), (170, 126052), (340, 63026), (680, 31513)]