21520395

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{36787}}^1$

素因数の和:36811

約数の個数: 24

約数和(自身を含む): 40172496

約数和(自身を除く): 18652101

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 195, 585, 36787, 110361, 183935, 331083, 478231, 551805, 1434693, 1655415, 2391155, 4304079, 7173465, 21520395]

約数ペア:

[(1, 21520395), (3, 7173465), (5, 4304079), (9, 2391155), (13, 1655415), (15, 1434693), (39, 551805), (45, 478231), (65, 331083), (117, 183935), (195, 110361), (585, 36787)]