81391220

素因数分解:

$2^2\times 5^1\times {\mathrm{829}}^1\times {\mathrm{4909}}^1$

素因数の和:5747

約数の個数: 24

約数和(自身を含む): 171162600

約数和(自身を除く): 89771380

約数列:

[1, 2, 4, 5, 10, 20, 829, 1658, 3316, 4145, 4909, 8290, 9818, 16580, 19636, 24545, 49090, 98180, 4069561, 8139122, 16278244, 20347805, 40695610, 81391220]

約数ペア:

[(1, 81391220), (2, 40695610), (4, 20347805), (5, 16278244), (10, 8139122), (20, 4069561), (829, 98180), (1658, 49090), (3316, 24545), (4145, 19636), (4909, 16580), (8290, 9818)]