12880760

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{5279}}^1$

素因数の和:5351

約数の個数: 32

約数和(自身を含む): 29462400

約数和(自身を除く): 16581640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 5279, 10558, 21116, 26395, 42232, 52790, 105580, 211160, 322019, 644038, 1288076, 1610095, 2576152, 3220190, 6440380, 12880760]

約数ペア:

[(1, 12880760), (2, 6440380), (4, 3220190), (5, 2576152), (8, 1610095), (10, 1288076), (20, 644038), (40, 322019), (61, 211160), (122, 105580), (244, 52790), (305, 42232), (488, 26395), (610, 21116), (1220, 10558), (2440, 5279)]