19978690

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{1481}}^1$

素因数の和:1578

約数の個数: 32

約数和(自身を含む): 38413440

約数和(自身を除く): 18434750

約数列:

[1, 2, 5, 10, 19, 38, 71, 95, 142, 190, 355, 710, 1349, 1481, 2698, 2962, 6745, 7405, 13490, 14810, 28139, 56278, 105151, 140695, 210302, 281390, 525755, 1051510, 1997869, 3995738, 9989345, 19978690]

約数ペア:

[(1, 19978690), (2, 9989345), (5, 3995738), (10, 1997869), (19, 1051510), (38, 525755), (71, 281390), (95, 210302), (142, 140695), (190, 105151), (355, 56278), (710, 28139), (1349, 14810), (1481, 13490), (2698, 7405), (2962, 6745)]