20518540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{113}}^1\times {\mathrm{1297}}^1$

素因数の和:1426

約数の個数: 48

約数和(自身を含む): 49718592

約数和(自身を除く): 29200052

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 113, 140, 226, 452, 565, 791, 1130, 1297, 1582, 2260, 2594, 3164, 3955, 5188, 6485, 7910, 9079, 12970, 15820, 18158, 25940, 36316, 45395, 90790, 146561, 181580, 293122, 586244, 732805, 1025927, 1465610, 2051854, 2931220, 4103708, 5129635, 10259270, 20518540]

約数ペア:

[(1, 20518540), (2, 10259270), (4, 5129635), (5, 4103708), (7, 2931220), (10, 2051854), (14, 1465610), (20, 1025927), (28, 732805), (35, 586244), (70, 293122), (113, 181580), (140, 146561), (226, 90790), (452, 45395), (565, 36316), (791, 25940), (1130, 18158), (1297, 15820), (1582, 12970), (2260, 9079), (2594, 7910), (3164, 6485), (3955, 5188)]