21137381

素因数分解:

${\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1\times {\mathrm{157}}^1$

素因数の和:332

約数の個数: 16

約数和(自身を含む): 22691328

約数和(自身を除く): 1553947

約数列:

[1, 31, 43, 101, 157, 1333, 3131, 4343, 4867, 6751, 15857, 134633, 209281, 491567, 681851, 21137381]

約数ペア:

[(1, 21137381), (31, 681851), (43, 491567), (101, 209281), (157, 134633), (1333, 15857), (3131, 6751), (4343, 4867)]