28678020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{68281}}^1$

素因数の和:68300

約数の個数: 48

約数和(自身を含む): 91771008

約数和(自身を除く): 63092988

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 68281, 136562, 204843, 273124, 341405, 409686, 477967, 682810, 819372, 955934, 1024215, 1365620, 1433901, 1911868, 2048430, 2389835, 2867802, 4096860, 4779670, 5735604, 7169505, 9559340, 14339010, 28678020]

約数ペア:

[(1, 28678020), (2, 14339010), (3, 9559340), (4, 7169505), (5, 5735604), (6, 4779670), (7, 4096860), (10, 2867802), (12, 2389835), (14, 2048430), (15, 1911868), (20, 1433901), (21, 1365620), (28, 1024215), (30, 955934), (35, 819372), (42, 682810), (60, 477967), (70, 409686), (84, 341405), (105, 273124), (140, 204843), (210, 136562), (420, 68281)]