21153431

素因数分解:

${\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{389}}^1$

素因数の和:538

約数の個数: 16

約数和(自身を含む): 23587200

約数和(自身を除く): 2433769

約数列:

[1, 13, 47, 89, 389, 611, 1157, 4183, 5057, 18283, 34621, 54379, 237679, 450073, 1627187, 21153431]

約数ペア:

[(1, 21153431), (13, 1627187), (47, 450073), (89, 237679), (389, 54379), (611, 34621), (1157, 18283), (4183, 5057)]