20402080

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{4397}}^1$

素因数の和:4441

約数の個数: 48

約数和(自身を含む): 49873320

約数和(自身を除く): 29471240

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, 4397, 4640, 8794, 17588, 21985, 35176, 43970, 70352, 87940, 127513, 140704, 175880, 255026, 351760, 510052, 637565, 703520, 1020104, 1275130, 2040208, 2550260, 4080416, 5100520, 10201040, 20402080]

約数ペア:

[(1, 20402080), (2, 10201040), (4, 5100520), (5, 4080416), (8, 2550260), (10, 2040208), (16, 1275130), (20, 1020104), (29, 703520), (32, 637565), (40, 510052), (58, 351760), (80, 255026), (116, 175880), (145, 140704), (160, 127513), (232, 87940), (290, 70352), (464, 43970), (580, 35176), (928, 21985), (1160, 17588), (2320, 8794), (4397, 4640)]