21782305

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{1579}}^1$

素因数の和:1704

約数の個数: 16

約数和(自身を含む): 27302400

約数和(自身を除く): 5520095

約数列:

[1, 5, 31, 89, 155, 445, 1579, 2759, 7895, 13795, 48949, 140531, 244745, 702655, 4356461, 21782305]

約数ペア:

[(1, 21782305), (5, 4356461), (31, 702655), (89, 244745), (155, 140531), (445, 48949), (1579, 13795), (2759, 7895)]