21605355

素因数分解:

$3^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{2153}}^1$

素因数の和:2387

約数の個数: 24

約数和(自身を含む): 37634688

約数和(自身を除く): 16029333

約数列:

[1, 3, 5, 9, 15, 45, 223, 669, 1115, 2007, 2153, 3345, 6459, 10035, 10765, 19377, 32295, 96885, 480119, 1440357, 2400595, 4321071, 7201785, 21605355]

約数ペア:

[(1, 21605355), (3, 7201785), (5, 4321071), (9, 2400595), (15, 1440357), (45, 480119), (223, 96885), (669, 32295), (1115, 19377), (2007, 10765), (2153, 10035), (3345, 6459)]