20451380

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{953}}^1$

素因数の和:1028

約数の個数: 48

約数和(自身を含む): 45677520

約数和(自身を除く): 25226140

約数列:

[1, 2, 4, 5, 10, 20, 29, 37, 58, 74, 116, 145, 148, 185, 290, 370, 580, 740, 953, 1073, 1906, 2146, 3812, 4292, 4765, 5365, 9530, 10730, 19060, 21460, 27637, 35261, 55274, 70522, 110548, 138185, 141044, 176305, 276370, 352610, 552740, 705220, 1022569, 2045138, 4090276, 5112845, 10225690, 20451380]

約数ペア:

[(1, 20451380), (2, 10225690), (4, 5112845), (5, 4090276), (10, 2045138), (20, 1022569), (29, 705220), (37, 552740), (58, 352610), (74, 276370), (116, 176305), (145, 141044), (148, 138185), (185, 110548), (290, 70522), (370, 55274), (580, 35261), (740, 27637), (953, 21460), (1073, 19060), (1906, 10730), (2146, 9530), (3812, 5365), (4292, 4765)]