21053855

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{107}}^1$

素因数の和:223

約数の個数: 32

約数和(自身を含む): 27993600

約数和(自身を除く): 6939745

約数列:

[1, 5, 23, 29, 59, 107, 115, 145, 295, 535, 667, 1357, 1711, 2461, 3103, 3335, 6313, 6785, 8555, 12305, 15515, 31565, 39353, 71369, 145199, 183077, 196765, 356845, 725995, 915385, 4210771, 21053855]

約数ペア:

[(1, 21053855), (5, 4210771), (23, 915385), (29, 725995), (59, 356845), (107, 196765), (115, 183077), (145, 145199), (295, 71369), (535, 39353), (667, 31565), (1357, 15515), (1711, 12305), (2461, 8555), (3103, 6785), (3335, 6313)]