21287150

素因数分解:

$2^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{9901}}^1$

素因数の和:9956

約数の個数: 24

約数和(自身を含む): 40518984

約数和(自身を除く): 19231834

約数列:

[1, 2, 5, 10, 25, 43, 50, 86, 215, 430, 1075, 2150, 9901, 19802, 49505, 99010, 247525, 425743, 495050, 851486, 2128715, 4257430, 10643575, 21287150]

約数ペア:

[(1, 21287150), (2, 10643575), (5, 4257430), (10, 2128715), (25, 851486), (43, 495050), (50, 425743), (86, 247525), (215, 99010), (430, 49505), (1075, 19802), (2150, 9901)]