19413125

素因数分解:

$5^4\times {\mathrm{89}}^1\times {\mathrm{349}}^1$

素因数の和:458

約数の個数: 20

約数和(自身を含む): 24601500

約数和(自身を除く): 5188375

約数列:

[1, 5, 25, 89, 125, 349, 445, 625, 1745, 2225, 8725, 11125, 31061, 43625, 55625, 155305, 218125, 776525, 3882625, 19413125]

約数ペア:

[(1, 19413125), (5, 3882625), (25, 776525), (89, 218125), (125, 155305), (349, 55625), (445, 43625), (625, 31061), (1745, 11125), (2225, 8725)]