21117945

素因数分解:

$3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{1129}}^1$

素因数の和:1209

約数の個数: 32

約数和(自身を含む): 35798400

約数和(自身を除く): 14680455

約数列:

[1, 3, 5, 15, 29, 43, 87, 129, 145, 215, 435, 645, 1129, 1247, 3387, 3741, 5645, 6235, 16935, 18705, 32741, 48547, 98223, 145641, 163705, 242735, 491115, 728205, 1407863, 4223589, 7039315, 21117945]

約数ペア:

[(1, 21117945), (3, 7039315), (5, 4223589), (15, 1407863), (29, 728205), (43, 491115), (87, 242735), (129, 163705), (145, 145641), (215, 98223), (435, 48547), (645, 32741), (1129, 18705), (1247, 16935), (3387, 6235), (3741, 5645)]