21666764

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{293}}^1$

素因数の和:462

約数の個数: 48

約数和(自身を含む): 46099200

約数和(自身を除く): 24432436

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 139, 266, 278, 293, 532, 556, 586, 973, 1172, 1946, 2051, 2641, 3892, 4102, 5282, 5567, 8204, 10564, 11134, 18487, 22268, 36974, 38969, 40727, 73948, 77938, 81454, 155876, 162908, 285089, 570178, 773813, 1140356, 1547626, 3095252, 5416691, 10833382, 21666764]

約数ペア:

[(1, 21666764), (2, 10833382), (4, 5416691), (7, 3095252), (14, 1547626), (19, 1140356), (28, 773813), (38, 570178), (76, 285089), (133, 162908), (139, 155876), (266, 81454), (278, 77938), (293, 73948), (532, 40727), (556, 38969), (586, 36974), (973, 22268), (1172, 18487), (1946, 11134), (2051, 10564), (2641, 8204), (3892, 5567), (4102, 5282)]