21149360

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15551}}^1$

素因数の和:15581

約数の個数: 40

約数和(自身を含む): 52068096

約数和(自身を除く): 30918736

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15551, 31102, 62204, 77755, 124408, 155510, 248816, 264367, 311020, 528734, 622040, 1057468, 1244080, 1321835, 2114936, 2643670, 4229872, 5287340, 10574680, 21149360]

約数ペア:

[(1, 21149360), (2, 10574680), (4, 5287340), (5, 4229872), (8, 2643670), (10, 2114936), (16, 1321835), (17, 1244080), (20, 1057468), (34, 622040), (40, 528734), (68, 311020), (80, 264367), (85, 248816), (136, 155510), (170, 124408), (272, 77755), (340, 62204), (680, 31102), (1360, 15551)]