81293380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{20023}}^1$

素因数の和:20068

約数の個数: 48

約数和(自身を含む): 201841920

約数和(自身を除く): 120548540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 20023, 40046, 80092, 100115, 140161, 200230, 280322, 400460, 560644, 580667, 700805, 1161334, 1401610, 2322668, 2803220, 2903335, 4064669, 5806670, 8129338, 11613340, 16258676, 20323345, 40646690, 81293380]

約数ペア:

[(1, 81293380), (2, 40646690), (4, 20323345), (5, 16258676), (7, 11613340), (10, 8129338), (14, 5806670), (20, 4064669), (28, 2903335), (29, 2803220), (35, 2322668), (58, 1401610), (70, 1161334), (116, 700805), (140, 580667), (145, 560644), (203, 400460), (290, 280322), (406, 200230), (580, 140161), (812, 100115), (1015, 80092), (2030, 40046), (4060, 20023)]