161818820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{425839}}^1$

素因数の和:425867

約数の個数: 24

約数和(自身を含む): 357705600

約数和(自身を除く): 195886780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 425839, 851678, 1703356, 2129195, 4258390, 8090941, 8516780, 16181882, 32363764, 40454705, 80909410, 161818820]

約数ペア:

[(1, 161818820), (2, 80909410), (4, 40454705), (5, 32363764), (10, 16181882), (19, 8516780), (20, 8090941), (38, 4258390), (76, 2129195), (95, 1703356), (190, 851678), (380, 425839)]