21300880

素因数分解:

$2^4\times 5^1\times {\mathrm{266261}}^1$

素因数の和:266274

約数の個数: 20

約数和(自身を含む): 49524732

約数和(自身を除く): 28223852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266261, 532522, 1065044, 1331305, 2130088, 2662610, 4260176, 5325220, 10650440, 21300880]

約数ペア:

[(1, 21300880), (2, 10650440), (4, 5325220), (5, 4260176), (8, 2662610), (10, 2130088), (16, 1331305), (20, 1065044), (40, 532522), (80, 266261)]