21706860

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51683}}^1$

素因数の和:51702

約数の個数: 48

約数和(自身を含む): 69463296

約数和(自身を除く): 47756436

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51683, 103366, 155049, 206732, 258415, 310098, 361781, 516830, 620196, 723562, 775245, 1033660, 1085343, 1447124, 1550490, 1808905, 2170686, 3100980, 3617810, 4341372, 5426715, 7235620, 10853430, 21706860]

約数ペア:

[(1, 21706860), (2, 10853430), (3, 7235620), (4, 5426715), (5, 4341372), (6, 3617810), (7, 3100980), (10, 2170686), (12, 1808905), (14, 1550490), (15, 1447124), (20, 1085343), (21, 1033660), (28, 775245), (30, 723562), (35, 620196), (42, 516830), (60, 361781), (70, 310098), (84, 258415), (105, 206732), (140, 155049), (210, 103366), (420, 51683)]