9990405

素因数分解:

$3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1721}}^1$

素因数の和:1778

約数の個数: 32

約数和(自身を含む): 18184320

約数和(自身を除く): 8193915

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 129, 135, 215, 387, 645, 1161, 1721, 1935, 5163, 5805, 8605, 15489, 25815, 46467, 74003, 77445, 222009, 232335, 370015, 666027, 1110045, 1998081, 3330135, 9990405]

約数ペア:

[(1, 9990405), (3, 3330135), (5, 1998081), (9, 1110045), (15, 666027), (27, 370015), (43, 232335), (45, 222009), (129, 77445), (135, 74003), (215, 46467), (387, 25815), (645, 15489), (1161, 8605), (1721, 5805), (1935, 5163)]