20858396

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{4507}}^1$

素因数の和:4613

約数の個数: 24

約数和(自身を含む): 39760560

約数和(自身を除く): 18902164

約数列:

[1, 2, 4, 13, 26, 52, 89, 178, 356, 1157, 2314, 4507, 4628, 9014, 18028, 58591, 117182, 234364, 401123, 802246, 1604492, 5214599, 10429198, 20858396]

約数ペア:

[(1, 20858396), (2, 10429198), (4, 5214599), (13, 1604492), (26, 802246), (52, 401123), (89, 234364), (178, 117182), (356, 58591), (1157, 18028), (2314, 9014), (4507, 4628)]