18564640

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{4001}}^1$

素因数の和:4045

約数の個数: 48

約数和(自身を含む): 45382680

約数和(自身を除く): 26818040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 80, 116, 145, 160, 232, 290, 464, 580, 928, 1160, 2320, 4001, 4640, 8002, 16004, 20005, 32008, 40010, 64016, 80020, 116029, 128032, 160040, 232058, 320080, 464116, 580145, 640160, 928232, 1160290, 1856464, 2320580, 3712928, 4641160, 9282320, 18564640]

約数ペア:

[(1, 18564640), (2, 9282320), (4, 4641160), (5, 3712928), (8, 2320580), (10, 1856464), (16, 1160290), (20, 928232), (29, 640160), (32, 580145), (40, 464116), (58, 320080), (80, 232058), (116, 160040), (145, 128032), (160, 116029), (232, 80020), (290, 64016), (464, 40010), (580, 32008), (928, 20005), (1160, 16004), (2320, 8002), (4001, 4640)]