21125013

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{347}}^1$

素因数の和:593

約数の個数: 32

約数和(自身を含む): 34922496

約数和(自身を除く): 13797483

約数列:

[1, 3, 7, 13, 21, 39, 91, 223, 273, 347, 669, 1041, 1561, 2429, 2899, 4511, 4683, 7287, 8697, 13533, 20293, 31577, 60879, 77381, 94731, 232143, 541667, 1005953, 1625001, 3017859, 7041671, 21125013]

約数ペア:

[(1, 21125013), (3, 7041671), (7, 3017859), (13, 1625001), (21, 1005953), (39, 541667), (91, 232143), (223, 94731), (273, 77381), (347, 60879), (669, 31577), (1041, 20293), (1561, 13533), (2429, 8697), (2899, 7287), (4511, 4683)]