19521260

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{997}}^1$

素因数の和:1106

約数の個数: 48

約数和(自身を含む): 45269280

約数和(自身を除く): 25748020

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 220, 356, 445, 890, 979, 997, 1780, 1958, 1994, 3916, 3988, 4895, 4985, 9790, 9970, 10967, 19580, 19940, 21934, 43868, 54835, 88733, 109670, 177466, 219340, 354932, 443665, 887330, 976063, 1774660, 1952126, 3904252, 4880315, 9760630, 19521260]

約数ペア:

[(1, 19521260), (2, 9760630), (4, 4880315), (5, 3904252), (10, 1952126), (11, 1774660), (20, 976063), (22, 887330), (44, 443665), (55, 354932), (89, 219340), (110, 177466), (178, 109670), (220, 88733), (356, 54835), (445, 43868), (890, 21934), (979, 19940), (997, 19580), (1780, 10967), (1958, 9970), (1994, 9790), (3916, 4985), (3988, 4895)]