21685175

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{643}}^1$

素因数の和:743

約数の個数: 24

約数和(自身を含む): 28748160

約数和(自身を除く): 7062985

約数列:

[1, 5, 19, 25, 71, 95, 355, 475, 643, 1349, 1775, 3215, 6745, 12217, 16075, 33725, 45653, 61085, 228265, 305425, 867407, 1141325, 4337035, 21685175]

約数ペア:

[(1, 21685175), (5, 4337035), (19, 1141325), (25, 867407), (71, 305425), (95, 228265), (355, 61085), (475, 45653), (643, 33725), (1349, 16075), (1775, 12217), (3215, 6745)]