21980535

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{20639}}^1$

素因数の和:20718

約数の個数: 16

約数和(自身を含む): 35665920

約数和(自身を除く): 13685385

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 20639, 61917, 103195, 309585, 1465369, 4396107, 7326845, 21980535]

約数ペア:

[(1, 21980535), (3, 7326845), (5, 4396107), (15, 1465369), (71, 309585), (213, 103195), (355, 61917), (1065, 20639)]