12790780

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{139}}^1$

素因数の和:298

約数の個数: 48

約数和(自身を含む): 27941760

約数和(自身を除く): 15150980

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 107, 139, 172, 214, 215, 278, 428, 430, 535, 556, 695, 860, 1070, 1390, 2140, 2780, 4601, 5977, 9202, 11954, 14873, 18404, 23005, 23908, 29746, 29885, 46010, 59492, 59770, 74365, 92020, 119540, 148730, 297460, 639539, 1279078, 2558156, 3197695, 6395390, 12790780]

約数ペア:

[(1, 12790780), (2, 6395390), (4, 3197695), (5, 2558156), (10, 1279078), (20, 639539), (43, 297460), (86, 148730), (107, 119540), (139, 92020), (172, 74365), (214, 59770), (215, 59492), (278, 46010), (428, 29885), (430, 29746), (535, 23908), (556, 23005), (695, 18404), (860, 14873), (1070, 11954), (1390, 9202), (2140, 5977), (2780, 4601)]