21002150

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{409}}^1$

素因数の和:513

約数の個数: 48

約数和(自身を含む): 42705600

約数和(自身を除く): 21703450

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 79, 130, 158, 325, 395, 409, 650, 790, 818, 1027, 1975, 2045, 2054, 3950, 4090, 5135, 5317, 10225, 10270, 10634, 20450, 25675, 26585, 32311, 51350, 53170, 64622, 132925, 161555, 265850, 323110, 420043, 807775, 840086, 1615550, 2100215, 4200430, 10501075, 21002150]

約数ペア:

[(1, 21002150), (2, 10501075), (5, 4200430), (10, 2100215), (13, 1615550), (25, 840086), (26, 807775), (50, 420043), (65, 323110), (79, 265850), (130, 161555), (158, 132925), (325, 64622), (395, 53170), (409, 51350), (650, 32311), (790, 26585), (818, 25675), (1027, 20450), (1975, 10634), (2045, 10270), (2054, 10225), (3950, 5317), (4090, 5135)]