28156040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{719}}^1$

素因数の和:830

約数の個数: 64

約数和(自身を含む): 69984000

約数和(自身を除く): 41827960

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 89, 110, 178, 220, 356, 440, 445, 712, 719, 890, 979, 1438, 1780, 1958, 2876, 3560, 3595, 3916, 4895, 5752, 7190, 7832, 7909, 9790, 14380, 15818, 19580, 28760, 31636, 39160, 39545, 63272, 63991, 79090, 127982, 158180, 255964, 316360, 319955, 511928, 639910, 703901, 1279820, 1407802, 2559640, 2815604, 3519505, 5631208, 7039010, 14078020, 28156040]

約数ペア:

[(1, 28156040), (2, 14078020), (4, 7039010), (5, 5631208), (8, 3519505), (10, 2815604), (11, 2559640), (20, 1407802), (22, 1279820), (40, 703901), (44, 639910), (55, 511928), (88, 319955), (89, 316360), (110, 255964), (178, 158180), (220, 127982), (356, 79090), (440, 63991), (445, 63272), (712, 39545), (719, 39160), (890, 31636), (979, 28760), (1438, 19580), (1780, 15818), (1958, 14380), (2876, 9790), (3560, 7909), (3595, 7832), (3916, 7190), (4895, 5752)]