19493680

素因数分解:

$2^4\times 5^1\times {\mathrm{243671}}^1$

素因数の和:243684

約数の個数: 20

約数和(自身を含む): 45322992

約数和(自身を除く): 25829312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 243671, 487342, 974684, 1218355, 1949368, 2436710, 3898736, 4873420, 9746840, 19493680]

約数ペア:

[(1, 19493680), (2, 9746840), (4, 4873420), (5, 3898736), (8, 2436710), (10, 1949368), (16, 1218355), (20, 974684), (40, 487342), (80, 243671)]