21071570

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{449}}^1$

素因数の和:507

約数の個数: 48

約数和(自身を含む): 43205400

約数和(自身を除く): 22133830

約数列:

[1, 2, 5, 10, 13, 19, 26, 38, 65, 95, 130, 190, 247, 361, 449, 494, 722, 898, 1235, 1805, 2245, 2470, 3610, 4490, 4693, 5837, 8531, 9386, 11674, 17062, 23465, 29185, 42655, 46930, 58370, 85310, 110903, 162089, 221806, 324178, 554515, 810445, 1109030, 1620890, 2107157, 4214314, 10535785, 21071570]

約数ペア:

[(1, 21071570), (2, 10535785), (5, 4214314), (10, 2107157), (13, 1620890), (19, 1109030), (26, 810445), (38, 554515), (65, 324178), (95, 221806), (130, 162089), (190, 110903), (247, 85310), (361, 58370), (449, 46930), (494, 42655), (722, 29185), (898, 23465), (1235, 17062), (1805, 11674), (2245, 9386), (2470, 8531), (3610, 5837), (4490, 4693)]