20712991

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{499}}^1$

素因数の和:646

約数の個数: 16

約数和(自身を含む): 23296000

約数和(自身を除く): 2583009

約数列:

[1, 13, 31, 103, 403, 499, 1339, 3193, 6487, 15469, 41509, 51397, 201097, 668161, 1593307, 20712991]

約数ペア:

[(1, 20712991), (13, 1593307), (31, 668161), (103, 201097), (403, 51397), (499, 41509), (1339, 15469), (3193, 6487)]