21306156

素因数分解:

$2^2\times 3^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1\times {\mathrm{263}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 51389184

約数和(自身を除く): 30083028

約数列:

[1, 2, 3, 4, 6, 12, 43, 86, 129, 157, 172, 258, 263, 314, 471, 516, 526, 628, 789, 942, 1052, 1578, 1884, 3156, 6751, 11309, 13502, 20253, 22618, 27004, 33927, 40506, 41291, 45236, 67854, 81012, 82582, 123873, 135708, 165164, 247746, 495492, 1775513, 3551026, 5326539, 7102052, 10653078, 21306156]

約数ペア:

[(1, 21306156), (2, 10653078), (3, 7102052), (4, 5326539), (6, 3551026), (12, 1775513), (43, 495492), (86, 247746), (129, 165164), (157, 135708), (172, 123873), (258, 82582), (263, 81012), (314, 67854), (471, 45236), (516, 41291), (526, 40506), (628, 33927), (789, 27004), (942, 22618), (1052, 20253), (1578, 13502), (1884, 11309), (3156, 6751)]