28771780

素因数分解:

$2^2\times 5^1\times {\mathrm{1021}}^1\times {\mathrm{1409}}^1$

素因数の和:2439

約数の個数: 24

約数和(自身を含む): 60522840

約数和(自身を除く): 31751060

約数列:

[1, 2, 4, 5, 10, 20, 1021, 1409, 2042, 2818, 4084, 5105, 5636, 7045, 10210, 14090, 20420, 28180, 1438589, 2877178, 5754356, 7192945, 14385890, 28771780]

約数ペア:

[(1, 28771780), (2, 14385890), (4, 7192945), (5, 5754356), (10, 2877178), (20, 1438589), (1021, 28180), (1409, 20420), (2042, 14090), (2818, 10210), (4084, 7045), (5105, 5636)]