21102940

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{337}}^1$

素因数の和:478

約数の個数: 48

約数和(自身を含む): 46335744

約数和(自身を除く): 25232804

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 101, 124, 155, 202, 310, 337, 404, 505, 620, 674, 1010, 1348, 1685, 2020, 3131, 3370, 6262, 6740, 10447, 12524, 15655, 20894, 31310, 34037, 41788, 52235, 62620, 68074, 104470, 136148, 170185, 208940, 340370, 680740, 1055147, 2110294, 4220588, 5275735, 10551470, 21102940]

約数ペア:

[(1, 21102940), (2, 10551470), (4, 5275735), (5, 4220588), (10, 2110294), (20, 1055147), (31, 680740), (62, 340370), (101, 208940), (124, 170185), (155, 136148), (202, 104470), (310, 68074), (337, 62620), (404, 52235), (505, 41788), (620, 34037), (674, 31310), (1010, 20894), (1348, 15655), (1685, 12524), (2020, 10447), (3131, 6740), (3370, 6262)]