21031515

素因数分解:

$3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{3623}}^1$

素因数の和:3680

約数の個数: 32

約数和(自身を含む): 38269440

約数和(自身を除く): 17237925

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 129, 135, 215, 387, 645, 1161, 1935, 3623, 5805, 10869, 18115, 32607, 54345, 97821, 155789, 163035, 467367, 489105, 778945, 1402101, 2336835, 4206303, 7010505, 21031515]

約数ペア:

[(1, 21031515), (3, 7010505), (5, 4206303), (9, 2336835), (15, 1402101), (27, 778945), (43, 489105), (45, 467367), (129, 163035), (135, 155789), (215, 97821), (387, 54345), (645, 32607), (1161, 18115), (1935, 10869), (3623, 5805)]