18920835

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{181}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 34751808

約数和(自身を除く): 15830973

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 101, 115, 181, 207, 303, 345, 505, 543, 905, 909, 1035, 1515, 1629, 2323, 2715, 4163, 4545, 6969, 8145, 11615, 12489, 18281, 20815, 20907, 34845, 37467, 54843, 62445, 91405, 104535, 164529, 187335, 274215, 420463, 822645, 1261389, 2102315, 3784167, 6306945, 18920835]

約数ペア:

[(1, 18920835), (3, 6306945), (5, 3784167), (9, 2102315), (15, 1261389), (23, 822645), (45, 420463), (69, 274215), (101, 187335), (115, 164529), (181, 104535), (207, 91405), (303, 62445), (345, 54843), (505, 37467), (543, 34845), (905, 20907), (909, 20815), (1035, 18281), (1515, 12489), (1629, 11615), (2323, 8145), (2715, 6969), (4163, 4545)]