21175105

素因数分解:

$5^1\times 7^3\times {\mathrm{12347}}^1$

素因数の和:12373

約数の個数: 16

約数和(自身を含む): 29635200

約数和(自身を除く): 8460095

約数列:

[1, 5, 7, 35, 49, 245, 343, 1715, 12347, 61735, 86429, 432145, 605003, 3025015, 4235021, 21175105]

約数ペア:

[(1, 21175105), (5, 4235021), (7, 3025015), (35, 605003), (49, 432145), (245, 86429), (343, 61735), (1715, 12347)]