20104220

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{241}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 43827168

約数和(自身を除く): 23722948

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 97, 172, 194, 215, 241, 388, 430, 482, 485, 860, 964, 970, 1205, 1940, 2410, 4171, 4820, 8342, 10363, 16684, 20726, 20855, 23377, 41452, 41710, 46754, 51815, 83420, 93508, 103630, 116885, 207260, 233770, 467540, 1005211, 2010422, 4020844, 5026055, 10052110, 20104220]

約数ペア:

[(1, 20104220), (2, 10052110), (4, 5026055), (5, 4020844), (10, 2010422), (20, 1005211), (43, 467540), (86, 233770), (97, 207260), (172, 116885), (194, 103630), (215, 93508), (241, 83420), (388, 51815), (430, 46754), (482, 41710), (485, 41452), (860, 23377), (964, 20855), (970, 20726), (1205, 16684), (1940, 10363), (2410, 8342), (4171, 4820)]