21425680

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{2503}}^1$

素因数の和:2623

約数の個数: 40

約数和(自身を含む): 50300352

約数和(自身を除く): 28874672

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 2503, 4280, 5006, 8560, 10012, 12515, 20024, 25030, 40048, 50060, 100120, 200240, 267821, 535642, 1071284, 1339105, 2142568, 2678210, 4285136, 5356420, 10712840, 21425680]

約数ペア:

[(1, 21425680), (2, 10712840), (4, 5356420), (5, 4285136), (8, 2678210), (10, 2142568), (16, 1339105), (20, 1071284), (40, 535642), (80, 267821), (107, 200240), (214, 100120), (428, 50060), (535, 40048), (856, 25030), (1070, 20024), (1712, 12515), (2140, 10012), (2503, 8560), (4280, 5006)]