20620580

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{421}}^1$

素因数の和:540

約数の個数: 48

約数和(自身を含む): 45373440

約数和(自身を除く): 24752860

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 79, 124, 155, 158, 310, 316, 395, 421, 620, 790, 842, 1580, 1684, 2105, 2449, 4210, 4898, 8420, 9796, 12245, 13051, 24490, 26102, 33259, 48980, 52204, 65255, 66518, 130510, 133036, 166295, 261020, 332590, 665180, 1031029, 2062058, 4124116, 5155145, 10310290, 20620580]

約数ペア:

[(1, 20620580), (2, 10310290), (4, 5155145), (5, 4124116), (10, 2062058), (20, 1031029), (31, 665180), (62, 332590), (79, 261020), (124, 166295), (155, 133036), (158, 130510), (310, 66518), (316, 65255), (395, 52204), (421, 48980), (620, 33259), (790, 26102), (842, 24490), (1580, 13051), (1684, 12245), (2105, 9796), (2449, 8420), (4210, 4898)]