21312018

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{4337}}^1$

素因数の和:4368

約数の個数: 64

約数和(自身を含む): 58302720

約数和(自身を除く): 36990702

約数列:

[1, 2, 3, 6, 7, 9, 13, 14, 18, 21, 26, 27, 39, 42, 54, 63, 78, 91, 117, 126, 182, 189, 234, 273, 351, 378, 546, 702, 819, 1638, 2457, 4337, 4914, 8674, 13011, 26022, 30359, 39033, 56381, 60718, 78066, 91077, 112762, 117099, 169143, 182154, 234198, 273231, 338286, 394667, 507429, 546462, 789334, 819693, 1014858, 1184001, 1522287, 1639386, 2368002, 3044574, 3552003, 7104006, 10656009, 21312018]

約数ペア:

[(1, 21312018), (2, 10656009), (3, 7104006), (6, 3552003), (7, 3044574), (9, 2368002), (13, 1639386), (14, 1522287), (18, 1184001), (21, 1014858), (26, 819693), (27, 789334), (39, 546462), (42, 507429), (54, 394667), (63, 338286), (78, 273231), (91, 234198), (117, 182154), (126, 169143), (182, 117099), (189, 112762), (234, 91077), (273, 78066), (351, 60718), (378, 56381), (546, 39033), (702, 30359), (819, 26022), (1638, 13011), (2457, 8674), (4337, 4914)]