21270260

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{887}}^1$

素因数の和:1016

約数の個数: 48

約数和(自身を含む): 49230720

約数和(自身を除く): 27960460

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 109, 110, 218, 220, 436, 545, 887, 1090, 1199, 1774, 2180, 2398, 3548, 4435, 4796, 5995, 8870, 9757, 11990, 17740, 19514, 23980, 39028, 48785, 96683, 97570, 193366, 195140, 386732, 483415, 966830, 1063513, 1933660, 2127026, 4254052, 5317565, 10635130, 21270260]

約数ペア:

[(1, 21270260), (2, 10635130), (4, 5317565), (5, 4254052), (10, 2127026), (11, 1933660), (20, 1063513), (22, 966830), (44, 483415), (55, 386732), (109, 195140), (110, 193366), (218, 97570), (220, 96683), (436, 48785), (545, 39028), (887, 23980), (1090, 19514), (1199, 17740), (1774, 11990), (2180, 9757), (2398, 8870), (3548, 5995), (4435, 4796)]