655126520

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{38903}}^1$

素因数の和:39335

約数の個数: 32

約数和(自身を含む): 1477573920

約数和(自身を除く): 822447400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1684, 2105, 3368, 4210, 8420, 16840, 38903, 77806, 155612, 194515, 311224, 389030, 778060, 1556120, 16378163, 32756326, 65512652, 81890815, 131025304, 163781630, 327563260, 655126520]

約数ペア:

[(1, 655126520), (2, 327563260), (4, 163781630), (5, 131025304), (8, 81890815), (10, 65512652), (20, 32756326), (40, 16378163), (421, 1556120), (842, 778060), (1684, 389030), (2105, 311224), (3368, 194515), (4210, 155612), (8420, 77806), (16840, 38903)]