18916720

素因数分解:

$2^4\times 5^1\times {\mathrm{179}}^1\times {\mathrm{1321}}^1$

素因数の和:1513

約数の個数: 40

約数和(自身を含む): 44260560

約数和(自身を除く): 25343840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 179, 358, 716, 895, 1321, 1432, 1790, 2642, 2864, 3580, 5284, 6605, 7160, 10568, 13210, 14320, 21136, 26420, 52840, 105680, 236459, 472918, 945836, 1182295, 1891672, 2364590, 3783344, 4729180, 9458360, 18916720]

約数ペア:

[(1, 18916720), (2, 9458360), (4, 4729180), (5, 3783344), (8, 2364590), (10, 1891672), (16, 1182295), (20, 945836), (40, 472918), (80, 236459), (179, 105680), (358, 52840), (716, 26420), (895, 21136), (1321, 14320), (1432, 13210), (1790, 10568), (2642, 7160), (2864, 6605), (3580, 5284)]