21606440

素因数分解:

$2^3\times 5^1\times {\mathrm{727}}^1\times {\mathrm{743}}^1$

素因数の和:1481

約数の個数: 32

約数和(自身を含む): 48746880

約数和(自身を除く): 27140440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 727, 743, 1454, 1486, 2908, 2972, 3635, 3715, 5816, 5944, 7270, 7430, 14540, 14860, 29080, 29720, 540161, 1080322, 2160644, 2700805, 4321288, 5401610, 10803220, 21606440]

約数ペア:

[(1, 21606440), (2, 10803220), (4, 5401610), (5, 4321288), (8, 2700805), (10, 2160644), (20, 1080322), (40, 540161), (727, 29720), (743, 29080), (1454, 14860), (1486, 14540), (2908, 7430), (2972, 7270), (3635, 5944), (3715, 5816)]