21152500

素因数分解:

$2^2\times 5^4\times {\mathrm{8461}}^1$

素因数の和:8485

約数の個数: 30

約数和(自身を含む): 46261754

約数和(自身を除く): 25109254

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 625, 1250, 2500, 8461, 16922, 33844, 42305, 84610, 169220, 211525, 423050, 846100, 1057625, 2115250, 4230500, 5288125, 10576250, 21152500]

約数ペア:

[(1, 21152500), (2, 10576250), (4, 5288125), (5, 4230500), (10, 2115250), (20, 1057625), (25, 846100), (50, 423050), (100, 211525), (125, 169220), (250, 84610), (500, 42305), (625, 33844), (1250, 16922), (2500, 8461)]