21302500

素因数分解:

$2^2\times 5^4\times {\mathrm{8521}}^1$

素因数の和:8545

約数の個数: 30

約数和(自身を含む): 46589774

約数和(自身を除く): 25287274

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 625, 1250, 2500, 8521, 17042, 34084, 42605, 85210, 170420, 213025, 426050, 852100, 1065125, 2130250, 4260500, 5325625, 10651250, 21302500]

約数ペア:

[(1, 21302500), (2, 10651250), (4, 5325625), (5, 4260500), (10, 2130250), (20, 1065125), (25, 852100), (50, 426050), (100, 213025), (125, 170420), (250, 85210), (500, 42605), (625, 34084), (1250, 17042), (2500, 8521)]