21990147221

素因数分解:

$7^1\times {\mathrm{293}}^1\times {\mathrm{449}}^1\times {\mathrm{23879}}^1$

素因数の和:24628

約数の個数: 16

約数和(自身を含む): 25274592000

約数和(自身を除く): 3284444779

約数列:

[1, 7, 293, 449, 2051, 3143, 23879, 131557, 167153, 920899, 6996547, 10721671, 48975829, 75051697, 3141449603, 21990147221]

約数ペア:

[(1, 21990147221), (7, 3141449603), (293, 75051697), (449, 48975829), (2051, 10721671), (3143, 6996547), (23879, 920899), (131557, 167153)]