21690040

素因数分解:

$2^3\times 5^1\times {\mathrm{542251}}^1$

素因数の和:542262

約数の個数: 16

約数和(自身を含む): 48802680

約数和(自身を除く): 27112640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 542251, 1084502, 2169004, 2711255, 4338008, 5422510, 10845020, 21690040]

約数ペア:

[(1, 21690040), (2, 10845020), (4, 5422510), (5, 4338008), (8, 2711255), (10, 2169004), (20, 1084502), (40, 542251)]