20842515

素因数分解:

$3^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{971}}^1$

素因数の和:1041

約数の個数: 40

約数和(自身を含む): 38106288

約数和(自身を除く): 17263773

約数列:

[1, 3, 5, 9, 15, 27, 45, 53, 81, 135, 159, 265, 405, 477, 795, 971, 1431, 2385, 2913, 4293, 4855, 7155, 8739, 14565, 21465, 26217, 43695, 51463, 78651, 131085, 154389, 257315, 393255, 463167, 771945, 1389501, 2315835, 4168503, 6947505, 20842515]

約数ペア:

[(1, 20842515), (3, 6947505), (5, 4168503), (9, 2315835), (15, 1389501), (27, 771945), (45, 463167), (53, 393255), (81, 257315), (135, 154389), (159, 131085), (265, 78651), (405, 51463), (477, 43695), (795, 26217), (971, 21465), (1431, 14565), (2385, 8739), (2913, 7155), (4293, 4855)]