18917780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{829}}^1$

素因数の和:1008

約数の個数: 48

約数和(自身を含む): 45736320

約数和(自身を除く): 26818540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 163, 326, 652, 815, 829, 1141, 1630, 1658, 2282, 3260, 3316, 4145, 4564, 5705, 5803, 8290, 11410, 11606, 16580, 22820, 23212, 29015, 58030, 116060, 135127, 270254, 540508, 675635, 945889, 1351270, 1891778, 2702540, 3783556, 4729445, 9458890, 18917780]

約数ペア:

[(1, 18917780), (2, 9458890), (4, 4729445), (5, 3783556), (7, 2702540), (10, 1891778), (14, 1351270), (20, 945889), (28, 675635), (35, 540508), (70, 270254), (140, 135127), (163, 116060), (326, 58030), (652, 29015), (815, 23212), (829, 22820), (1141, 16580), (1630, 11606), (1658, 11410), (2282, 8290), (3260, 5803), (3316, 5705), (4145, 4564)]