21496540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{2851}}^1$

素因数の和:2902

約数の個数: 48

約数和(自身を含む): 50309280

約数和(自身を除く): 28812740

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 29, 52, 58, 65, 116, 130, 145, 260, 290, 377, 580, 754, 1508, 1885, 2851, 3770, 5702, 7540, 11404, 14255, 28510, 37063, 57020, 74126, 82679, 148252, 165358, 185315, 330716, 370630, 413395, 741260, 826790, 1074827, 1653580, 2149654, 4299308, 5374135, 10748270, 21496540]

約数ペア:

[(1, 21496540), (2, 10748270), (4, 5374135), (5, 4299308), (10, 2149654), (13, 1653580), (20, 1074827), (26, 826790), (29, 741260), (52, 413395), (58, 370630), (65, 330716), (116, 185315), (130, 165358), (145, 148252), (260, 82679), (290, 74126), (377, 57020), (580, 37063), (754, 28510), (1508, 14255), (1885, 11404), (2851, 7540), (3770, 5702)]