21080

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1$

素因数の和:59

約数の個数: 32

約数和(自身を含む): 51840

約数和(自身を除く): 30760

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 31, 34, 40, 62, 68, 85, 124, 136, 155, 170, 248, 310, 340, 527, 620, 680, 1054, 1240, 2108, 2635, 4216, 5270, 10540, 21080]

約数ペア:

[(1, 21080), (2, 10540), (4, 5270), (5, 4216), (8, 2635), (10, 2108), (17, 1240), (20, 1054), (31, 680), (34, 620), (40, 527), (62, 340), (68, 310), (85, 248), (124, 170), (136, 155)]