20785760

素因数分解:

$2^5\times 5^1\times {\mathrm{163}}^1\times {\mathrm{797}}^1$

素因数の和:975

約数の個数: 48

約数和(自身を含む): 49469616

約数和(自身を除く): 28683856

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 163, 326, 652, 797, 815, 1304, 1594, 1630, 2608, 3188, 3260, 3985, 5216, 6376, 6520, 7970, 12752, 13040, 15940, 25504, 26080, 31880, 63760, 127520, 129911, 259822, 519644, 649555, 1039288, 1299110, 2078576, 2598220, 4157152, 5196440, 10392880, 20785760]

約数ペア:

[(1, 20785760), (2, 10392880), (4, 5196440), (5, 4157152), (8, 2598220), (10, 2078576), (16, 1299110), (20, 1039288), (32, 649555), (40, 519644), (80, 259822), (160, 129911), (163, 127520), (326, 63760), (652, 31880), (797, 26080), (815, 25504), (1304, 15940), (1594, 13040), (1630, 12752), (2608, 7970), (3188, 6520), (3260, 6376), (3985, 5216)]