20819560

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{1801}}^1$

素因数の和:1846

約数の個数: 48

約数和(自身を含む): 49789260

約数和(自身を除く): 28969700

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 289, 340, 578, 680, 1156, 1445, 1801, 2312, 2890, 3602, 5780, 7204, 9005, 11560, 14408, 18010, 30617, 36020, 61234, 72040, 122468, 153085, 244936, 306170, 520489, 612340, 1040978, 1224680, 2081956, 2602445, 4163912, 5204890, 10409780, 20819560]

約数ペア:

[(1, 20819560), (2, 10409780), (4, 5204890), (5, 4163912), (8, 2602445), (10, 2081956), (17, 1224680), (20, 1040978), (34, 612340), (40, 520489), (68, 306170), (85, 244936), (136, 153085), (170, 122468), (289, 72040), (340, 61234), (578, 36020), (680, 30617), (1156, 18010), (1445, 14408), (1801, 11560), (2312, 9005), (2890, 7204), (3602, 5780)]