21070215

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10889}}^1$

素因数の和:10943

約数の個数: 24

約数和(自身を含む): 37374480

約数和(自身を除く): 16304265

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 10889, 32667, 54445, 98001, 163335, 468227, 490005, 1404681, 2341135, 4214043, 7023405, 21070215]

約数ペア:

[(1, 21070215), (3, 7023405), (5, 4214043), (9, 2341135), (15, 1404681), (43, 490005), (45, 468227), (129, 163335), (215, 98001), (387, 54445), (645, 32667), (1935, 10889)]