28204990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1$

素因数の和:217

約数の個数: 64

約数和(自身を含む): 58164480

約数和(自身を除く): 29959490

約数列:

[1, 2, 5, 10, 11, 22, 43, 55, 67, 86, 89, 110, 134, 178, 215, 335, 430, 445, 473, 670, 737, 890, 946, 979, 1474, 1958, 2365, 2881, 3685, 3827, 4730, 4895, 5762, 5963, 7370, 7654, 9790, 11926, 14405, 19135, 28810, 29815, 31691, 38270, 42097, 59630, 63382, 65593, 84194, 131186, 158455, 210485, 256409, 316910, 327965, 420970, 512818, 655930, 1282045, 2564090, 2820499, 5640998, 14102495, 28204990]

約数ペア:

[(1, 28204990), (2, 14102495), (5, 5640998), (10, 2820499), (11, 2564090), (22, 1282045), (43, 655930), (55, 512818), (67, 420970), (86, 327965), (89, 316910), (110, 256409), (134, 210485), (178, 158455), (215, 131186), (335, 84194), (430, 65593), (445, 63382), (473, 59630), (670, 42097), (737, 38270), (890, 31691), (946, 29815), (979, 28810), (1474, 19135), (1958, 14405), (2365, 11926), (2881, 9790), (3685, 7654), (3827, 7370), (4730, 5963), (4895, 5762)]