21392285

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1$

素因数の和:197

約数の個数: 32

約数和(自身を含む): 28131840

約数和(自身を除く): 6739555

約数列:

[1, 5, 29, 43, 47, 73, 145, 215, 235, 365, 1247, 1363, 2021, 2117, 3139, 3431, 6235, 6815, 10105, 10585, 15695, 17155, 58609, 91031, 99499, 147533, 293045, 455155, 497495, 737665, 4278457, 21392285]

約数ペア:

[(1, 21392285), (5, 4278457), (29, 737665), (43, 497495), (47, 455155), (73, 293045), (145, 147533), (215, 99499), (235, 91031), (365, 58609), (1247, 17155), (1363, 15695), (2021, 10585), (2117, 10105), (3139, 6815), (3431, 6235)]