21754205

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{593}}^1$

素因数の和:661

約数の個数: 32

約数和(自身を含む): 30792960

約数和(自身を除く): 9038755

約数列:

[1, 5, 11, 23, 29, 55, 115, 145, 253, 319, 593, 667, 1265, 1595, 2965, 3335, 6523, 7337, 13639, 17197, 32615, 36685, 68195, 85985, 150029, 189167, 395531, 750145, 945835, 1977655, 4350841, 21754205]

約数ペア:

[(1, 21754205), (5, 4350841), (11, 1977655), (23, 945835), (29, 750145), (55, 395531), (115, 189167), (145, 150029), (253, 85985), (319, 68195), (593, 36685), (667, 32615), (1265, 17197), (1595, 13639), (2965, 7337), (3335, 6523)]