20647970

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{397}}^1\times {\mathrm{743}}^1$

素因数の和:1154

約数の個数: 32

約数和(自身を含む): 42640128

約数和(自身を除く): 21992158

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 397, 743, 794, 1486, 1985, 2779, 3715, 3970, 5201, 5558, 7430, 10402, 13895, 26005, 27790, 52010, 294971, 589942, 1474855, 2064797, 2949710, 4129594, 10323985, 20647970]

約数ペア:

[(1, 20647970), (2, 10323985), (5, 4129594), (7, 2949710), (10, 2064797), (14, 1474855), (35, 589942), (70, 294971), (397, 52010), (743, 27790), (794, 26005), (1486, 13895), (1985, 10402), (2779, 7430), (3715, 5558), (3970, 5201)]