19985570

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{83}}^1\times {\mathrm{199}}^1$

素因数の和:311

約数の個数: 48

約数和(自身を含む): 40219200

約数和(自身を除く): 20233630

約数列:

[1, 2, 5, 10, 11, 22, 55, 83, 110, 121, 166, 199, 242, 398, 415, 605, 830, 913, 995, 1210, 1826, 1990, 2189, 4378, 4565, 9130, 10043, 10945, 16517, 20086, 21890, 24079, 33034, 48158, 50215, 82585, 100430, 120395, 165170, 181687, 240790, 363374, 908435, 1816870, 1998557, 3997114, 9992785, 19985570]

約数ペア:

[(1, 19985570), (2, 9992785), (5, 3997114), (10, 1998557), (11, 1816870), (22, 908435), (55, 363374), (83, 240790), (110, 181687), (121, 165170), (166, 120395), (199, 100430), (242, 82585), (398, 50215), (415, 48158), (605, 33034), (830, 24079), (913, 21890), (995, 20086), (1210, 16517), (1826, 10945), (1990, 10043), (2189, 9130), (4378, 4565)]