21155590

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{51599}}^1$

素因数の和:51647

約数の個数: 16

約数和(自身を含む): 39009600

約数和(自身を除く): 17854010

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 51599, 103198, 257995, 515990, 2115559, 4231118, 10577795, 21155590]

約数ペア:

[(1, 21155590), (2, 10577795), (5, 4231118), (10, 2115559), (41, 515990), (82, 257995), (205, 103198), (410, 51599)]