20455420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{3539}}^1$

素因数の和:3582

約数の個数: 36

約数和(自身を含む): 45644760

約数和(自身を除く): 25189340

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 289, 340, 578, 1156, 1445, 2890, 3539, 5780, 7078, 14156, 17695, 35390, 60163, 70780, 120326, 240652, 300815, 601630, 1022771, 1203260, 2045542, 4091084, 5113855, 10227710, 20455420]

約数ペア:

[(1, 20455420), (2, 10227710), (4, 5113855), (5, 4091084), (10, 2045542), (17, 1203260), (20, 1022771), (34, 601630), (68, 300815), (85, 240652), (170, 120326), (289, 70780), (340, 60163), (578, 35390), (1156, 17695), (1445, 14156), (2890, 7078), (3539, 5780)]