20200995

素因数分解:

$3^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1609}}^1$

素因数の和:1657

約数の個数: 40

約数和(自身を含む): 37403520

約数和(自身を除く): 17202525

約数列:

[1, 3, 5, 9, 15, 27, 31, 45, 81, 93, 135, 155, 279, 405, 465, 837, 1395, 1609, 2511, 4185, 4827, 8045, 12555, 14481, 24135, 43443, 49879, 72405, 130329, 149637, 217215, 249395, 448911, 651645, 748185, 1346733, 2244555, 4040199, 6733665, 20200995]

約数ペア:

[(1, 20200995), (3, 6733665), (5, 4040199), (9, 2244555), (15, 1346733), (27, 748185), (31, 651645), (45, 448911), (81, 249395), (93, 217215), (135, 149637), (155, 130329), (279, 72405), (405, 49879), (465, 43443), (837, 24135), (1395, 14481), (1609, 12555), (2511, 8045), (4185, 4827)]