20658680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{829}}^1$

素因数の和:936

約数の個数: 64

約数和(自身を含む): 53784000

約数和(自身を除く): 33125320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 89, 140, 178, 280, 356, 445, 623, 712, 829, 890, 1246, 1658, 1780, 2492, 3115, 3316, 3560, 4145, 4984, 5803, 6230, 6632, 8290, 11606, 12460, 16580, 23212, 24920, 29015, 33160, 46424, 58030, 73781, 116060, 147562, 232120, 295124, 368905, 516467, 590248, 737810, 1032934, 1475620, 2065868, 2582335, 2951240, 4131736, 5164670, 10329340, 20658680]

約数ペア:

[(1, 20658680), (2, 10329340), (4, 5164670), (5, 4131736), (7, 2951240), (8, 2582335), (10, 2065868), (14, 1475620), (20, 1032934), (28, 737810), (35, 590248), (40, 516467), (56, 368905), (70, 295124), (89, 232120), (140, 147562), (178, 116060), (280, 73781), (356, 58030), (445, 46424), (623, 33160), (712, 29015), (829, 24920), (890, 23212), (1246, 16580), (1658, 12460), (1780, 11606), (2492, 8290), (3115, 6632), (3316, 6230), (3560, 5803), (4145, 4984)]