20829560

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5851}}^1$

素因数の和:5951

約数の個数: 32

約数和(自身を含む): 47401200

約数和(自身を除く): 26571640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 5851, 11702, 23404, 29255, 46808, 58510, 117020, 234040, 520739, 1041478, 2082956, 2603695, 4165912, 5207390, 10414780, 20829560]

約数ペア:

[(1, 20829560), (2, 10414780), (4, 5207390), (5, 4165912), (8, 2603695), (10, 2082956), (20, 1041478), (40, 520739), (89, 234040), (178, 117020), (356, 58510), (445, 46808), (712, 29255), (890, 23404), (1780, 11702), (3560, 5851)]