21126975

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{6551}}^1$

素因数の和:6607

約数の個数: 24

約数和(自身を含む): 35747712

約数和(自身を除く): 14620737

約数列:

[1, 3, 5, 15, 25, 43, 75, 129, 215, 645, 1075, 3225, 6551, 19653, 32755, 98265, 163775, 281693, 491325, 845079, 1408465, 4225395, 7042325, 21126975]

約数ペア:

[(1, 21126975), (3, 7042325), (5, 4225395), (15, 1408465), (25, 845079), (43, 491325), (75, 281693), (129, 163775), (215, 98265), (645, 32755), (1075, 19653), (3225, 6551)]