18938720

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{2887}}^1$

素因数の和:2943

約数の個数: 48

約数和(自身を含む): 45849888

約数和(自身を除く): 26911168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 80, 82, 160, 164, 205, 328, 410, 656, 820, 1312, 1640, 2887, 3280, 5774, 6560, 11548, 14435, 23096, 28870, 46192, 57740, 92384, 115480, 118367, 230960, 236734, 461920, 473468, 591835, 946936, 1183670, 1893872, 2367340, 3787744, 4734680, 9469360, 18938720]

約数ペア:

[(1, 18938720), (2, 9469360), (4, 4734680), (5, 3787744), (8, 2367340), (10, 1893872), (16, 1183670), (20, 946936), (32, 591835), (40, 473468), (41, 461920), (80, 236734), (82, 230960), (160, 118367), (164, 115480), (205, 92384), (328, 57740), (410, 46192), (656, 28870), (820, 23096), (1312, 14435), (1640, 11548), (2887, 6560), (3280, 5774)]