19984575

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{199}}^1$

素因数の和:328

約数の個数: 48

約数和(自身を含む): 36108800

約数和(自身を除く): 16124225

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 103, 195, 199, 309, 325, 515, 597, 975, 995, 1339, 1545, 2575, 2587, 2985, 4017, 4975, 6695, 7725, 7761, 12935, 14925, 20085, 20497, 33475, 38805, 61491, 64675, 100425, 102485, 194025, 266461, 307455, 512425, 799383, 1332305, 1537275, 3996915, 6661525, 19984575]

約数ペア:

[(1, 19984575), (3, 6661525), (5, 3996915), (13, 1537275), (15, 1332305), (25, 799383), (39, 512425), (65, 307455), (75, 266461), (103, 194025), (195, 102485), (199, 100425), (309, 64675), (325, 61491), (515, 38805), (597, 33475), (975, 20497), (995, 20085), (1339, 14925), (1545, 12935), (2575, 7761), (2587, 7725), (2985, 6695), (4017, 4975)]