9990640

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{11353}}^1$

素因数の和:11377

約数の個数: 40

約数和(自身を含む): 25342128

約数和(自身を除く): 15351488

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 11353, 22706, 45412, 56765, 90824, 113530, 124883, 181648, 227060, 249766, 454120, 499532, 624415, 908240, 999064, 1248830, 1998128, 2497660, 4995320, 9990640]

約数ペア:

[(1, 9990640), (2, 4995320), (4, 2497660), (5, 1998128), (8, 1248830), (10, 999064), (11, 908240), (16, 624415), (20, 499532), (22, 454120), (40, 249766), (44, 227060), (55, 181648), (80, 124883), (88, 113530), (110, 90824), (176, 56765), (220, 45412), (440, 22706), (880, 11353)]