20818690

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{34129}}^1$

素因数の和:34197

約数の個数: 16

約数和(自身を含む): 38089080

約数和(自身を除く): 17270390

約数列:

[1, 2, 5, 10, 61, 122, 305, 610, 34129, 68258, 170645, 341290, 2081869, 4163738, 10409345, 20818690]

約数ペア:

[(1, 20818690), (2, 10409345), (5, 4163738), (10, 2081869), (61, 341290), (122, 170645), (305, 68258), (610, 34129)]