28191905

素因数分解:

$5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{5003}}^1$

素因数の和:5045

約数の個数: 24

約数和(自身を含む): 41072832

約数和(自身を除く): 12880927

約数列:

[1, 5, 7, 23, 35, 49, 115, 161, 245, 805, 1127, 5003, 5635, 25015, 35021, 115069, 175105, 245147, 575345, 805483, 1225735, 4027415, 5638381, 28191905]

約数ペア:

[(1, 28191905), (5, 5638381), (7, 4027415), (23, 1225735), (35, 805483), (49, 575345), (115, 245147), (161, 175105), (245, 115069), (805, 35021), (1127, 25015), (5003, 5635)]