390145880

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1\times {\mathrm{2081}}^1$

素因数の和:2244

約数の個数: 64

約数和(自身を含む): 906919200

約数和(自身を除く): 516773320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 109, 172, 215, 218, 344, 430, 436, 545, 860, 872, 1090, 1720, 2081, 2180, 4162, 4360, 4687, 8324, 9374, 10405, 16648, 18748, 20810, 23435, 37496, 41620, 46870, 83240, 89483, 93740, 178966, 187480, 226829, 357932, 447415, 453658, 715864, 894830, 907316, 1134145, 1789660, 1814632, 2268290, 3579320, 4536580, 9073160, 9753647, 19507294, 39014588, 48768235, 78029176, 97536470, 195072940, 390145880]

約数ペア:

[(1, 390145880), (2, 195072940), (4, 97536470), (5, 78029176), (8, 48768235), (10, 39014588), (20, 19507294), (40, 9753647), (43, 9073160), (86, 4536580), (109, 3579320), (172, 2268290), (215, 1814632), (218, 1789660), (344, 1134145), (430, 907316), (436, 894830), (545, 715864), (860, 453658), (872, 447415), (1090, 357932), (1720, 226829), (2081, 187480), (2180, 178966), (4162, 93740), (4360, 89483), (4687, 83240), (8324, 46870), (9374, 41620), (10405, 37496), (16648, 23435), (18748, 20810)]