21504885

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{751}}^1$

素因数の和:865

約数の個数: 32

約数和(自身を含む): 36384768

約数和(自身を除く): 14879883

約数列:

[1, 3, 5, 15, 23, 69, 83, 115, 249, 345, 415, 751, 1245, 1909, 2253, 3755, 5727, 9545, 11265, 17273, 28635, 51819, 62333, 86365, 186999, 259095, 311665, 934995, 1433659, 4300977, 7168295, 21504885]

約数ペア:

[(1, 21504885), (3, 7168295), (5, 4300977), (15, 1433659), (23, 934995), (69, 311665), (83, 259095), (115, 186999), (249, 86365), (345, 62333), (415, 51819), (751, 28635), (1245, 17273), (1909, 11265), (2253, 9545), (3755, 5727)]