21311895

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{227}}^1\times {\mathrm{569}}^1$

素因数の和:815

約数の個数: 32

約数和(自身を含む): 37428480

約数和(自身を除く): 16116585

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 227, 569, 681, 1135, 1707, 2497, 2845, 3405, 6259, 7491, 8535, 12485, 18777, 31295, 37455, 93885, 129163, 387489, 645815, 1420793, 1937445, 4262379, 7103965, 21311895]

約数ペア:

[(1, 21311895), (3, 7103965), (5, 4262379), (11, 1937445), (15, 1420793), (33, 645815), (55, 387489), (165, 129163), (227, 93885), (569, 37455), (681, 31295), (1135, 18777), (1707, 12485), (2497, 8535), (2845, 7491), (3405, 6259)]