128215420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{4271}}^1$

素因数の和:4378

約数の個数: 48

約数和(自身を含む): 287078400

約数和(自身を除く): 158862980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 79, 95, 158, 190, 316, 380, 395, 790, 1501, 1580, 3002, 4271, 6004, 7505, 8542, 15010, 17084, 21355, 30020, 42710, 81149, 85420, 162298, 324596, 337409, 405745, 674818, 811490, 1349636, 1622980, 1687045, 3374090, 6410771, 6748180, 12821542, 25643084, 32053855, 64107710, 128215420]

約数ペア:

[(1, 128215420), (2, 64107710), (4, 32053855), (5, 25643084), (10, 12821542), (19, 6748180), (20, 6410771), (38, 3374090), (76, 1687045), (79, 1622980), (95, 1349636), (158, 811490), (190, 674818), (316, 405745), (380, 337409), (395, 324596), (790, 162298), (1501, 85420), (1580, 81149), (3002, 42710), (4271, 30020), (6004, 21355), (7505, 17084), (8542, 15010)]