21312190

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{68749}}^1$

素因数の和:68787

約数の個数: 16

約数和(自身を含む): 39600000

約数和(自身を除く): 18287810

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 68749, 137498, 343745, 687490, 2131219, 4262438, 10656095, 21312190]

約数ペア:

[(1, 21312190), (2, 10656095), (5, 4262438), (10, 2131219), (31, 687490), (62, 343745), (155, 137498), (310, 68749)]