21744760

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{13259}}^1$

素因数の和:13311

約数の個数: 32

約数和(自身を含む): 50122800

約数和(自身を除く): 28378040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 13259, 26518, 53036, 66295, 106072, 132590, 265180, 530360, 543619, 1087238, 2174476, 2718095, 4348952, 5436190, 10872380, 21744760]

約数ペア:

[(1, 21744760), (2, 10872380), (4, 5436190), (5, 4348952), (8, 2718095), (10, 2174476), (20, 1087238), (40, 543619), (41, 530360), (82, 265180), (164, 132590), (205, 106072), (328, 66295), (410, 53036), (820, 26518), (1640, 13259)]