21590985

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{263}}^1\times {\mathrm{421}}^1$

素因数の和:705

約数の個数: 32

約数和(自身を含む): 37433088

約数和(自身を除く): 15842103

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 263, 421, 789, 1263, 1315, 2105, 3419, 3945, 5473, 6315, 10257, 16419, 17095, 27365, 51285, 82095, 110723, 332169, 553615, 1439399, 1660845, 4318197, 7196995, 21590985]

約数ペア:

[(1, 21590985), (3, 7196995), (5, 4318197), (13, 1660845), (15, 1439399), (39, 553615), (65, 332169), (195, 110723), (263, 82095), (421, 51285), (789, 27365), (1263, 17095), (1315, 16419), (2105, 10257), (3419, 6315), (3945, 5473)]