28681665

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61681}}^1$

素因数の和:61720

約数の個数: 16

約数和(自身を含む): 47371776

約数和(自身を除く): 18690111

約数列:

[1, 3, 5, 15, 31, 93, 155, 465, 61681, 185043, 308405, 925215, 1912111, 5736333, 9560555, 28681665]

約数ペア:

[(1, 28681665), (3, 9560555), (5, 5736333), (15, 1912111), (31, 925215), (93, 308405), (155, 185043), (465, 61681)]