20928875

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{491}}^1$

素因数の和:548

約数の個数: 32

約数和(自身を含む): 29472768

約数和(自身を除く): 8543893

約数列:

[1, 5, 11, 25, 31, 55, 125, 155, 275, 341, 491, 775, 1375, 1705, 2455, 3875, 5401, 8525, 12275, 15221, 27005, 42625, 61375, 76105, 135025, 167431, 380525, 675125, 837155, 1902625, 4185775, 20928875]

約数ペア:

[(1, 20928875), (5, 4185775), (11, 1902625), (25, 837155), (31, 675125), (55, 380525), (125, 167431), (155, 135025), (275, 76105), (341, 61375), (491, 42625), (775, 27005), (1375, 15221), (1705, 12275), (2455, 8525), (3875, 5401)]