21659638

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{349}}^1$

素因数の和:413

約数の個数: 64

約数和(自身を含む): 45158400

約数和(自身を除く): 23498762

約数列:

[1, 2, 7, 11, 13, 14, 22, 26, 31, 62, 77, 91, 143, 154, 182, 217, 286, 341, 349, 403, 434, 682, 698, 806, 1001, 2002, 2387, 2443, 2821, 3839, 4433, 4537, 4774, 4886, 5642, 7678, 8866, 9074, 10819, 21638, 26873, 31031, 31759, 49907, 53746, 62062, 63518, 75733, 99814, 119009, 140647, 151466, 238018, 281294, 349349, 698698, 833063, 984529, 1547117, 1666126, 1969058, 3094234, 10829819, 21659638]

約数ペア:

[(1, 21659638), (2, 10829819), (7, 3094234), (11, 1969058), (13, 1666126), (14, 1547117), (22, 984529), (26, 833063), (31, 698698), (62, 349349), (77, 281294), (91, 238018), (143, 151466), (154, 140647), (182, 119009), (217, 99814), (286, 75733), (341, 63518), (349, 62062), (403, 53746), (434, 49907), (682, 31759), (698, 31031), (806, 26873), (1001, 21638), (2002, 10819), (2387, 9074), (2443, 8866), (2821, 7678), (3839, 5642), (4433, 4886), (4537, 4774)]