20557520

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{8861}}^1$

素因数の和:8903

約数の個数: 40

約数和(自身を含む): 49449960

約数和(自身を除く): 28892440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 464, 580, 1160, 2320, 8861, 17722, 35444, 44305, 70888, 88610, 141776, 177220, 256969, 354440, 513938, 708880, 1027876, 1284845, 2055752, 2569690, 4111504, 5139380, 10278760, 20557520]

約数ペア:

[(1, 20557520), (2, 10278760), (4, 5139380), (5, 4111504), (8, 2569690), (10, 2055752), (16, 1284845), (20, 1027876), (29, 708880), (40, 513938), (58, 354440), (80, 256969), (116, 177220), (145, 141776), (232, 88610), (290, 70888), (464, 44305), (580, 35444), (1160, 17722), (2320, 8861)]