21420972

素因数分解:

$2^2\times 3^2\times {\mathrm{67}}^1\times {\mathrm{83}}^1\times {\mathrm{107}}^1$

素因数の和:267

約数の個数: 72

約数和(自身を含む): 56137536

約数和(自身を除く): 34716564

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 67, 83, 107, 134, 166, 201, 214, 249, 268, 321, 332, 402, 428, 498, 603, 642, 747, 804, 963, 996, 1206, 1284, 1494, 1926, 2412, 2988, 3852, 5561, 7169, 8881, 11122, 14338, 16683, 17762, 21507, 22244, 26643, 28676, 33366, 35524, 43014, 50049, 53286, 64521, 66732, 79929, 86028, 100098, 106572, 129042, 159858, 200196, 258084, 319716, 595027, 1190054, 1785081, 2380108, 3570162, 5355243, 7140324, 10710486, 21420972]

約数ペア:

[(1, 21420972), (2, 10710486), (3, 7140324), (4, 5355243), (6, 3570162), (9, 2380108), (12, 1785081), (18, 1190054), (36, 595027), (67, 319716), (83, 258084), (107, 200196), (134, 159858), (166, 129042), (201, 106572), (214, 100098), (249, 86028), (268, 79929), (321, 66732), (332, 64521), (402, 53286), (428, 50049), (498, 43014), (603, 35524), (642, 33366), (747, 28676), (804, 26643), (963, 22244), (996, 21507), (1206, 17762), (1284, 16683), (1494, 14338), (1926, 11122), (2412, 8881), (2988, 7169), (3852, 5561)]