81008820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{1069}}^1$

素因数の和:1505

約数の個数: 72

約数和(自身を含む): 246540840

約数和(自身を除く): 165532020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 421, 842, 1069, 1263, 1684, 2105, 2138, 2526, 3207, 3789, 4210, 4276, 5052, 5345, 6315, 6414, 7578, 8420, 9621, 10690, 12630, 12828, 15156, 16035, 18945, 19242, 21380, 25260, 32070, 37890, 38484, 48105, 64140, 75780, 96210, 192420, 450049, 900098, 1350147, 1800196, 2250245, 2700294, 4050441, 4500490, 5400588, 6750735, 8100882, 9000980, 13501470, 16201764, 20252205, 27002940, 40504410, 81008820]

約数ペア:

[(1, 81008820), (2, 40504410), (3, 27002940), (4, 20252205), (5, 16201764), (6, 13501470), (9, 9000980), (10, 8100882), (12, 6750735), (15, 5400588), (18, 4500490), (20, 4050441), (30, 2700294), (36, 2250245), (45, 1800196), (60, 1350147), (90, 900098), (180, 450049), (421, 192420), (842, 96210), (1069, 75780), (1263, 64140), (1684, 48105), (2105, 38484), (2138, 37890), (2526, 32070), (3207, 25260), (3789, 21380), (4210, 19242), (4276, 18945), (5052, 16035), (5345, 15156), (6315, 12828), (6414, 12630), (7578, 10690), (8420, 9621)]