21943760

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{6379}}^1$

素因数の和:6435

約数の個数: 40

約数和(自身を含む): 52213920

約数和(自身を除く): 30270160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 6379, 12758, 25516, 31895, 51032, 63790, 102064, 127580, 255160, 274297, 510320, 548594, 1097188, 1371485, 2194376, 2742970, 4388752, 5485940, 10971880, 21943760]

約数ペア:

[(1, 21943760), (2, 10971880), (4, 5485940), (5, 4388752), (8, 2742970), (10, 2194376), (16, 1371485), (20, 1097188), (40, 548594), (43, 510320), (80, 274297), (86, 255160), (172, 127580), (215, 102064), (344, 63790), (430, 51032), (688, 31895), (860, 25516), (1720, 12758), (3440, 6379)]