20128745

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{83}}^1$

素因数の和:162

約数の個数: 48

約数和(自身を含む): 30989952

約数和(自身を除く): 10861207

約数列:

[1, 5, 7, 13, 35, 41, 65, 83, 91, 169, 205, 287, 415, 455, 533, 581, 845, 1079, 1183, 1435, 2665, 2905, 3403, 3731, 5395, 5915, 6929, 7553, 14027, 17015, 18655, 23821, 34645, 37765, 44239, 48503, 70135, 98189, 119105, 221195, 242515, 309673, 490945, 575107, 1548365, 2875535, 4025749, 20128745]

約数ペア:

[(1, 20128745), (5, 4025749), (7, 2875535), (13, 1548365), (35, 575107), (41, 490945), (65, 309673), (83, 242515), (91, 221195), (169, 119105), (205, 98189), (287, 70135), (415, 48503), (455, 44239), (533, 37765), (581, 34645), (845, 23821), (1079, 18655), (1183, 17015), (1435, 14027), (2665, 7553), (2905, 6929), (3403, 5915), (3731, 5395)]