19904045

素因数分解:

$5^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{593}}^1$

素因数の和:749

約数の個数: 24

約数和(自身を含む): 28034424

約数和(自身を除く): 8130379

約数列:

[1, 5, 7, 35, 49, 137, 245, 593, 685, 959, 2965, 4151, 4795, 6713, 20755, 29057, 33565, 81241, 145285, 406205, 568687, 2843435, 3980809, 19904045]

約数ペア:

[(1, 19904045), (5, 3980809), (7, 2843435), (35, 568687), (49, 406205), (137, 145285), (245, 81241), (593, 33565), (685, 29057), (959, 20755), (2965, 6713), (4151, 4795)]