213125

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{31}}^1$

素因数の和:62

約数の個数: 20

約数和(自身を含む): 299904

約数和(自身を除く): 86779

約数列:

[1, 5, 11, 25, 31, 55, 125, 155, 275, 341, 625, 775, 1375, 1705, 3875, 6875, 8525, 19375, 42625, 213125]

約数ペア:

[(1, 213125), (5, 42625), (11, 19375), (25, 8525), (31, 6875), (55, 3875), (125, 1705), (155, 1375), (275, 775), (341, 625)]