18820425

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{199}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 34025600

約数和(自身を除く): 15205175

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 97, 195, 199, 291, 325, 485, 597, 975, 995, 1261, 1455, 2425, 2587, 2985, 3783, 4975, 6305, 7275, 7761, 12935, 14925, 18915, 19303, 31525, 38805, 57909, 64675, 94575, 96515, 194025, 250939, 289545, 482575, 752817, 1254695, 1447725, 3764085, 6273475, 18820425]

約数ペア:

[(1, 18820425), (3, 6273475), (5, 3764085), (13, 1447725), (15, 1254695), (25, 752817), (39, 482575), (65, 289545), (75, 250939), (97, 194025), (195, 96515), (199, 94575), (291, 64675), (325, 57909), (485, 38805), (597, 31525), (975, 19303), (995, 18915), (1261, 14925), (1455, 12935), (2425, 7761), (2587, 7275), (2985, 6305), (3783, 4975)]