21604540

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26347}}^1$

素因数の和:26397

約数の個数: 24

約数和(自身を含む): 46477872

約数和(自身を除く): 24873332

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26347, 52694, 105388, 131735, 263470, 526940, 1080227, 2160454, 4320908, 5401135, 10802270, 21604540]

約数ペア:

[(1, 21604540), (2, 10802270), (4, 5401135), (5, 4320908), (10, 2160454), (20, 1080227), (41, 526940), (82, 263470), (164, 131735), (205, 105388), (410, 52694), (820, 26347)]