20702799

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{139}}^1$

素因数の和:244

約数の個数: 48

約数和(自身を含む): 34652800

約数和(自身を除く): 13950001

約数列:

[1, 3, 9, 13, 19, 39, 57, 67, 117, 139, 171, 201, 247, 417, 603, 741, 871, 1251, 1273, 1807, 2223, 2613, 2641, 3819, 5421, 7839, 7923, 9313, 11457, 16263, 16549, 23769, 27939, 34333, 49647, 83817, 102999, 121069, 148941, 176947, 308997, 363207, 530841, 1089621, 1592523, 2300311, 6900933, 20702799]

約数ペア:

[(1, 20702799), (3, 6900933), (9, 2300311), (13, 1592523), (19, 1089621), (39, 530841), (57, 363207), (67, 308997), (117, 176947), (139, 148941), (171, 121069), (201, 102999), (247, 83817), (417, 49647), (603, 34333), (741, 27939), (871, 23769), (1251, 16549), (1273, 16263), (1807, 11457), (2223, 9313), (2613, 7923), (2641, 7839), (3819, 5421)]