21781785

素因数分解:

$3^1\times 5^1\times {\mathrm{227}}^1\times {\mathrm{6397}}^1$

素因数の和:6632

約数の個数: 16

約数和(自身を含む): 35009856

約数和(自身を除く): 13228071

約数列:

[1, 3, 5, 15, 227, 681, 1135, 3405, 6397, 19191, 31985, 95955, 1452119, 4356357, 7260595, 21781785]

約数ペア:

[(1, 21781785), (3, 7260595), (5, 4356357), (15, 1452119), (227, 95955), (681, 31985), (1135, 19191), (3405, 6397)]