21720625

素因数分解:

$5^4\times {\mathrm{23}}^1\times {\mathrm{1511}}^1$

素因数の和:1554

約数の個数: 20

約数和(自身を含む): 28340928

約数和(自身を除く): 6620303

約数列:

[1, 5, 23, 25, 115, 125, 575, 625, 1511, 2875, 7555, 14375, 34753, 37775, 173765, 188875, 868825, 944375, 4344125, 21720625]

約数ペア:

[(1, 21720625), (5, 4344125), (23, 944375), (25, 868825), (115, 188875), (125, 173765), (575, 37775), (625, 34753), (1511, 14375), (2875, 7555)]