21027645

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10867}}^1$

素因数の和:10921

約数の個数: 24

約数和(自身を含む): 37298976

約数和(自身を除く): 16271331

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 10867, 32601, 54335, 97803, 163005, 467281, 489015, 1401843, 2336405, 4205529, 7009215, 21027645]

約数ペア:

[(1, 21027645), (3, 7009215), (5, 4205529), (9, 2336405), (15, 1401843), (43, 489015), (45, 467281), (129, 163005), (215, 97803), (387, 54335), (645, 32601), (1935, 10867)]