20147905

素因数分解:

$5^1\times {\mathrm{67}}^1\times {\mathrm{137}}^1\times {\mathrm{439}}^1$

素因数の和:648

約数の個数: 16

約数和(自身を含む): 24773760

約数和(自身を除く): 4625855

約数列:

[1, 5, 67, 137, 335, 439, 685, 2195, 9179, 29413, 45895, 60143, 147065, 300715, 4029581, 20147905]

約数ペア:

[(1, 20147905), (5, 4029581), (67, 300715), (137, 147065), (335, 60143), (439, 45895), (685, 29413), (2195, 9179)]