21906990

素因数分解:

$2^1\times 3^3\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{173}}^1$

素因数の和:263

約数の個数: 128

約数和(自身を含む): 68152320

約数和(自身を除く): 46245330

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 42, 45, 54, 63, 67, 70, 90, 105, 126, 134, 135, 173, 189, 201, 210, 270, 315, 335, 346, 378, 402, 469, 519, 603, 630, 670, 865, 938, 945, 1005, 1038, 1206, 1211, 1407, 1557, 1730, 1809, 1890, 2010, 2345, 2422, 2595, 2814, 3015, 3114, 3618, 3633, 4221, 4671, 4690, 5190, 6030, 6055, 7035, 7266, 7785, 8442, 9045, 9342, 10899, 11591, 12110, 12663, 14070, 15570, 18090, 18165, 21105, 21798, 23182, 23355, 25326, 32697, 34773, 36330, 42210, 46710, 54495, 57955, 63315, 65394, 69546, 81137, 104319, 108990, 115910, 126630, 162274, 163485, 173865, 208638, 243411, 312957, 326970, 347730, 405685, 486822, 521595, 625914, 730233, 811370, 1043190, 1217055, 1460466, 1564785, 2190699, 2434110, 3129570, 3651165, 4381398, 7302330, 10953495, 21906990]

約数ペア:

[(1, 21906990), (2, 10953495), (3, 7302330), (5, 4381398), (6, 3651165), (7, 3129570), (9, 2434110), (10, 2190699), (14, 1564785), (15, 1460466), (18, 1217055), (21, 1043190), (27, 811370), (30, 730233), (35, 625914), (42, 521595), (45, 486822), (54, 405685), (63, 347730), (67, 326970), (70, 312957), (90, 243411), (105, 208638), (126, 173865), (134, 163485), (135, 162274), (173, 126630), (189, 115910), (201, 108990), (210, 104319), (270, 81137), (315, 69546), (335, 65394), (346, 63315), (378, 57955), (402, 54495), (469, 46710), (519, 42210), (603, 36330), (630, 34773), (670, 32697), (865, 25326), (938, 23355), (945, 23182), (1005, 21798), (1038, 21105), (1206, 18165), (1211, 18090), (1407, 15570), (1557, 14070), (1730, 12663), (1809, 12110), (1890, 11591), (2010, 10899), (2345, 9342), (2422, 9045), (2595, 8442), (2814, 7785), (3015, 7266), (3114, 7035), (3618, 6055), (3633, 6030), (4221, 5190), (4671, 4690)]