20180994560

素因数分解:

$2^9\times 5^1\times {\mathrm{71}}^1\times {\mathrm{111031}}^1$

素因数の和:111125

約数の個数: 80

約数和(自身を含む): 49069037952

約数和(自身を除く): 28888043392

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 71, 80, 128, 142, 160, 256, 284, 320, 355, 512, 568, 640, 710, 1136, 1280, 1420, 2272, 2560, 2840, 4544, 5680, 9088, 11360, 18176, 22720, 36352, 45440, 90880, 111031, 181760, 222062, 444124, 555155, 888248, 1110310, 1776496, 2220620, 3552992, 4441240, 7105984, 7883201, 8882480, 14211968, 15766402, 17764960, 28423936, 31532804, 35529920, 39416005, 56847872, 63065608, 71059840, 78832010, 126131216, 142119680, 157664020, 252262432, 284239360, 315328040, 504524864, 630656080, 1009049728, 1261312160, 2018099456, 2522624320, 4036198912, 5045248640, 10090497280, 20180994560]

約数ペア:

[(1, 20180994560), (2, 10090497280), (4, 5045248640), (5, 4036198912), (8, 2522624320), (10, 2018099456), (16, 1261312160), (20, 1009049728), (32, 630656080), (40, 504524864), (64, 315328040), (71, 284239360), (80, 252262432), (128, 157664020), (142, 142119680), (160, 126131216), (256, 78832010), (284, 71059840), (320, 63065608), (355, 56847872), (512, 39416005), (568, 35529920), (640, 31532804), (710, 28423936), (1136, 17764960), (1280, 15766402), (1420, 14211968), (2272, 8882480), (2560, 7883201), (2840, 7105984), (4544, 4441240), (5680, 3552992), (9088, 2220620), (11360, 1776496), (18176, 1110310), (22720, 888248), (36352, 555155), (45440, 444124), (90880, 222062), (111031, 181760)]