128972455

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{101}}^1\times {\mathrm{181}}^1$

素因数の和:387

約数の個数: 32

約数和(自身を含む): 168412608

約数和(自身を除く): 39440153

約数列:

[1, 5, 17, 83, 85, 101, 181, 415, 505, 905, 1411, 1717, 3077, 7055, 8383, 8585, 15023, 15385, 18281, 41915, 75115, 91405, 142511, 255391, 310777, 712555, 1276955, 1517323, 1553885, 7586615, 25794491, 128972455]

約数ペア:

[(1, 128972455), (5, 25794491), (17, 7586615), (83, 1553885), (85, 1517323), (101, 1276955), (181, 712555), (415, 310777), (505, 255391), (905, 142511), (1411, 91405), (1717, 75115), (3077, 41915), (7055, 18281), (8383, 15385), (8585, 15023)]