256758125

素因数分解:

$5^4\times {\mathrm{13}}^1\times {\mathrm{31601}}^1$

素因数の和:31634

約数の個数: 20

約数和(自身を含む): 345536268

約数和(自身を除く): 88778143

約数列:

[1, 5, 13, 25, 65, 125, 325, 625, 1625, 8125, 31601, 158005, 410813, 790025, 2054065, 3950125, 10270325, 19750625, 51351625, 256758125]

約数ペア:

[(1, 256758125), (5, 51351625), (13, 19750625), (25, 10270325), (65, 3950125), (125, 2054065), (325, 790025), (625, 410813), (1625, 158005), (8125, 31601)]