20870290

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{397}}^1\times {\mathrm{751}}^1$

素因数の和:1162

約数の個数: 32

約数和(自身を含む): 43098624

約数和(自身を除く): 22228334

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 397, 751, 794, 1502, 1985, 2779, 3755, 3970, 5257, 5558, 7510, 10514, 13895, 26285, 27790, 52570, 298147, 596294, 1490735, 2087029, 2981470, 4174058, 10435145, 20870290]

約数ペア:

[(1, 20870290), (2, 10435145), (5, 4174058), (7, 2981470), (10, 2087029), (14, 1490735), (35, 596294), (70, 298147), (397, 52570), (751, 27790), (794, 26285), (1502, 13895), (1985, 10514), (2779, 7510), (3755, 5558), (3970, 5257)]