21491844280

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{919}}^1\times {\mathrm{4463}}^1$

素因数の和:5524

約数の個数: 64

約数和(自身を含む): 48789734400

約数和(自身を除く): 27297890120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 919, 1048, 1310, 1838, 2620, 3676, 4463, 4595, 5240, 7352, 8926, 9190, 17852, 18380, 22315, 35704, 36760, 44630, 89260, 120389, 178520, 240778, 481556, 584653, 601945, 963112, 1169306, 1203890, 2338612, 2407780, 2923265, 4101497, 4677224, 4815560, 5846530, 8202994, 11693060, 16405988, 20507485, 23386120, 32811976, 41014970, 82029940, 164059880, 537296107, 1074592214, 2149184428, 2686480535, 4298368856, 5372961070, 10745922140, 21491844280]

約数ペア:

[(1, 21491844280), (2, 10745922140), (4, 5372961070), (5, 4298368856), (8, 2686480535), (10, 2149184428), (20, 1074592214), (40, 537296107), (131, 164059880), (262, 82029940), (524, 41014970), (655, 32811976), (919, 23386120), (1048, 20507485), (1310, 16405988), (1838, 11693060), (2620, 8202994), (3676, 5846530), (4463, 4815560), (4595, 4677224), (5240, 4101497), (7352, 2923265), (8926, 2407780), (9190, 2338612), (17852, 1203890), (18380, 1169306), (22315, 963112), (35704, 601945), (36760, 584653), (44630, 481556), (89260, 240778), (120389, 178520)]