21756425

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{281}}^1$

素因数の和:473

約数の個数: 24

約数和(自身を含む): 28673760

約数和(自身を除く): 6917335

約数列:

[1, 5, 19, 25, 95, 163, 281, 475, 815, 1405, 3097, 4075, 5339, 7025, 15485, 26695, 45803, 77425, 133475, 229015, 870257, 1145075, 4351285, 21756425]

約数ペア:

[(1, 21756425), (5, 4351285), (19, 1145075), (25, 870257), (95, 229015), (163, 133475), (281, 77425), (475, 45803), (815, 26695), (1405, 15485), (3097, 7025), (4075, 5339)]