20257940

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{937}}^1$

素因数の和:1016

約数の個数: 48

約数和(自身を含む): 45384192

約数和(自身を除く): 25126252

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 47, 92, 94, 115, 188, 230, 235, 460, 470, 937, 940, 1081, 1874, 2162, 3748, 4324, 4685, 5405, 9370, 10810, 18740, 21551, 21620, 43102, 44039, 86204, 88078, 107755, 176156, 215510, 220195, 431020, 440390, 880780, 1012897, 2025794, 4051588, 5064485, 10128970, 20257940]

約数ペア:

[(1, 20257940), (2, 10128970), (4, 5064485), (5, 4051588), (10, 2025794), (20, 1012897), (23, 880780), (46, 440390), (47, 431020), (92, 220195), (94, 215510), (115, 176156), (188, 107755), (230, 88078), (235, 86204), (460, 44039), (470, 43102), (937, 21620), (940, 21551), (1081, 18740), (1874, 10810), (2162, 9370), (3748, 5405), (4324, 4685)]