21199905

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{20483}}^1$

素因数の和:20517

約数の個数: 24

約数和(自身を含む): 38346048

約数和(自身を除く): 17146143

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 20483, 61449, 102415, 184347, 307245, 471109, 921735, 1413327, 2355545, 4239981, 7066635, 21199905]

約数ペア:

[(1, 21199905), (3, 7066635), (5, 4239981), (9, 2355545), (15, 1413327), (23, 921735), (45, 471109), (69, 307245), (115, 184347), (207, 102415), (345, 61449), (1035, 20483)]