20649285

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{281}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 38009088

約数和(自身を除く): 17359803

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 71, 115, 207, 213, 281, 345, 355, 639, 843, 1035, 1065, 1405, 1633, 2529, 3195, 4215, 4899, 6463, 8165, 12645, 14697, 19389, 19951, 24495, 32315, 58167, 59853, 73485, 96945, 99755, 179559, 290835, 299265, 458873, 897795, 1376619, 2294365, 4129857, 6883095, 20649285]

約数ペア:

[(1, 20649285), (3, 6883095), (5, 4129857), (9, 2294365), (15, 1376619), (23, 897795), (45, 458873), (69, 299265), (71, 290835), (115, 179559), (207, 99755), (213, 96945), (281, 73485), (345, 59853), (355, 58167), (639, 32315), (843, 24495), (1035, 19951), (1065, 19389), (1405, 14697), (1633, 12645), (2529, 8165), (3195, 6463), (4215, 4899)]