20966420

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{977}}^1$

素因数の和:1052

約数の個数: 48

約数和(自身を含む): 46826640

約数和(自身を除く): 25860220

約数列:

[1, 2, 4, 5, 10, 20, 29, 37, 58, 74, 116, 145, 148, 185, 290, 370, 580, 740, 977, 1073, 1954, 2146, 3908, 4292, 4885, 5365, 9770, 10730, 19540, 21460, 28333, 36149, 56666, 72298, 113332, 141665, 144596, 180745, 283330, 361490, 566660, 722980, 1048321, 2096642, 4193284, 5241605, 10483210, 20966420]

約数ペア:

[(1, 20966420), (2, 10483210), (4, 5241605), (5, 4193284), (10, 2096642), (20, 1048321), (29, 722980), (37, 566660), (58, 361490), (74, 283330), (116, 180745), (145, 144596), (148, 141665), (185, 113332), (290, 72298), (370, 56666), (580, 36149), (740, 28333), (977, 21460), (1073, 19540), (1954, 10730), (2146, 9770), (3908, 5365), (4292, 4885)]