21671235

素因数分解:

$3^2\times 5^1\times {\mathrm{439}}^1\times {\mathrm{1097}}^1$

素因数の和:1547

約数の個数: 24

約数和(自身を含む): 37683360

約数和(自身を除く): 16012125

約数列:

[1, 3, 5, 9, 15, 45, 439, 1097, 1317, 2195, 3291, 3951, 5485, 6585, 9873, 16455, 19755, 49365, 481583, 1444749, 2407915, 4334247, 7223745, 21671235]

約数ペア:

[(1, 21671235), (3, 7223745), (5, 4334247), (9, 2407915), (15, 1444749), (45, 481583), (439, 49365), (1097, 19755), (1317, 16455), (2195, 9873), (3291, 6585), (3951, 5485)]