20918456

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{201139}}^1$

素因数の和:201158

約数の個数: 16

約数和(自身を含む): 42239400

約数和(自身を除く): 21320944

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 201139, 402278, 804556, 1609112, 2614807, 5229614, 10459228, 20918456]

約数ペア:

[(1, 20918456), (2, 10459228), (4, 5229614), (8, 2614807), (13, 1609112), (26, 804556), (52, 402278), (104, 201139)]