20504705

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{16603}}^1$

素因数の和:16640

約数の個数: 16

約数和(自身を含む): 27894720

約数和(自身を除く): 7390015

約数列:

[1, 5, 13, 19, 65, 95, 247, 1235, 16603, 83015, 215839, 315457, 1079195, 1577285, 4100941, 20504705]

約数ペア:

[(1, 20504705), (5, 4100941), (13, 1577285), (19, 1079195), (65, 315457), (95, 215839), (247, 83015), (1235, 16603)]