19977320

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{45403}}^1$

素因数の和:45425

約数の個数: 32

約数和(自身を含む): 49036320

約数和(自身を除く): 29059000

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 45403, 90806, 181612, 227015, 363224, 454030, 499433, 908060, 998866, 1816120, 1997732, 2497165, 3995464, 4994330, 9988660, 19977320]

約数ペア:

[(1, 19977320), (2, 9988660), (4, 4994330), (5, 3995464), (8, 2497165), (10, 1997732), (11, 1816120), (20, 998866), (22, 908060), (40, 499433), (44, 454030), (55, 363224), (88, 227015), (110, 181612), (220, 90806), (440, 45403)]