21391645

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{2969}}^1$

素因数の和:3116

約数の個数: 16

約数和(自身を含む): 28226880

約数和(自身を除く): 6835235

約数列:

[1, 5, 11, 55, 131, 655, 1441, 2969, 7205, 14845, 32659, 163295, 388939, 1944695, 4278329, 21391645]

約数ペア:

[(1, 21391645), (5, 4278329), (11, 1944695), (55, 388939), (131, 163295), (655, 32659), (1441, 14845), (2969, 7205)]