21242380

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{55901}}^1$

素因数の和:55929

約数の個数: 24

約数和(自身を含む): 46957680

約数和(自身を除く): 25715300

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 55901, 111802, 223604, 279505, 559010, 1062119, 1118020, 2124238, 4248476, 5310595, 10621190, 21242380]

約数ペア:

[(1, 21242380), (2, 10621190), (4, 5310595), (5, 4248476), (10, 2124238), (19, 1118020), (20, 1062119), (38, 559010), (76, 279505), (95, 223604), (190, 111802), (380, 55901)]