18909885

素因数分解:

$3^1\times 5^1\times {\mathrm{29}}^2\times {\mathrm{1499}}^1$

素因数の和:1565

約数の個数: 24

約数和(自身を含む): 31356000

約数和(自身を除く): 12446115

約数列:

[1, 3, 5, 15, 29, 87, 145, 435, 841, 1499, 2523, 4205, 4497, 7495, 12615, 22485, 43471, 130413, 217355, 652065, 1260659, 3781977, 6303295, 18909885]

約数ペア:

[(1, 18909885), (3, 6303295), (5, 3781977), (15, 1260659), (29, 652065), (87, 217355), (145, 130413), (435, 43471), (841, 22485), (1499, 12615), (2523, 7495), (4205, 4497)]