20125625

素因数分解:

$5^4\times {\mathrm{13}}^1\times {\mathrm{2477}}^1$

素因数の和:2510

約数の個数: 20

約数和(自身を含む): 27094452

約数和(自身を除く): 6968827

約数列:

[1, 5, 13, 25, 65, 125, 325, 625, 1625, 2477, 8125, 12385, 32201, 61925, 161005, 309625, 805025, 1548125, 4025125, 20125625]

約数ペア:

[(1, 20125625), (5, 4025125), (13, 1548125), (25, 805025), (65, 309625), (125, 161005), (325, 61925), (625, 32201), (1625, 12385), (2477, 8125)]