21572915

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2789}}^1$

素因数の和:2831

約数の個数: 32

約数和(自身を含む): 33747840

約数和(自身を除く): 12174925

約数列:

[1, 5, 7, 13, 17, 35, 65, 85, 91, 119, 221, 455, 595, 1105, 1547, 2789, 7735, 13945, 19523, 36257, 47413, 97615, 181285, 237065, 253799, 331891, 616369, 1268995, 1659455, 3081845, 4314583, 21572915]

約数ペア:

[(1, 21572915), (5, 4314583), (7, 3081845), (13, 1659455), (17, 1268995), (35, 616369), (65, 331891), (85, 253799), (91, 237065), (119, 181285), (221, 97615), (455, 47413), (595, 36257), (1105, 19523), (1547, 13945), (2789, 7735)]