21660561

素因数分解:

$3^3\times {\mathrm{13}}^2\times {\mathrm{47}}^1\times {\mathrm{101}}^1$

素因数の和:183

約数の個数: 48

約数和(自身を含む): 35838720

約数和(自身を除く): 14178159

約数列:

[1, 3, 9, 13, 27, 39, 47, 101, 117, 141, 169, 303, 351, 423, 507, 611, 909, 1269, 1313, 1521, 1833, 2727, 3939, 4563, 4747, 5499, 7943, 11817, 14241, 16497, 17069, 23829, 35451, 42723, 51207, 61711, 71487, 128169, 153621, 185133, 214461, 460863, 555399, 802243, 1666197, 2406729, 7220187, 21660561]

約数ペア:

[(1, 21660561), (3, 7220187), (9, 2406729), (13, 1666197), (27, 802243), (39, 555399), (47, 460863), (101, 214461), (117, 185133), (141, 153621), (169, 128169), (303, 71487), (351, 61711), (423, 51207), (507, 42723), (611, 35451), (909, 23829), (1269, 17069), (1313, 16497), (1521, 14241), (1833, 11817), (2727, 7943), (3939, 5499), (4563, 4747)]