19485020

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{163}}^1$

素因数の和:354

約数の個数: 48

約数和(自身を含む): 42430080

約数和(自身を除く): 22945060

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 139, 163, 172, 215, 278, 326, 430, 556, 652, 695, 815, 860, 1390, 1630, 2780, 3260, 5977, 7009, 11954, 14018, 22657, 23908, 28036, 29885, 35045, 45314, 59770, 70090, 90628, 113285, 119540, 140180, 226570, 453140, 974251, 1948502, 3897004, 4871255, 9742510, 19485020]

約数ペア:

[(1, 19485020), (2, 9742510), (4, 4871255), (5, 3897004), (10, 1948502), (20, 974251), (43, 453140), (86, 226570), (139, 140180), (163, 119540), (172, 113285), (215, 90628), (278, 70090), (326, 59770), (430, 45314), (556, 35045), (652, 29885), (695, 28036), (815, 23908), (860, 22657), (1390, 14018), (1630, 11954), (2780, 7009), (3260, 5977)]