20556860

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{1151}}^1$

素因数の和:1226

約数の個数: 48

約数和(自身を含む): 46448640

約数和(自身を除く): 25891780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 47, 76, 94, 95, 188, 190, 235, 380, 470, 893, 940, 1151, 1786, 2302, 3572, 4465, 4604, 5755, 8930, 11510, 17860, 21869, 23020, 43738, 54097, 87476, 108194, 109345, 216388, 218690, 270485, 437380, 540970, 1027843, 1081940, 2055686, 4111372, 5139215, 10278430, 20556860]

約数ペア:

[(1, 20556860), (2, 10278430), (4, 5139215), (5, 4111372), (10, 2055686), (19, 1081940), (20, 1027843), (38, 540970), (47, 437380), (76, 270485), (94, 218690), (95, 216388), (188, 109345), (190, 108194), (235, 87476), (380, 54097), (470, 43738), (893, 23020), (940, 21869), (1151, 17860), (1786, 11510), (2302, 8930), (3572, 5755), (4465, 4604)]