21601545

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{419}}^1\times {\mathrm{491}}^1$

素因数の和:925

約数の個数: 32

約数和(自身を含む): 39674880

約数和(自身を除く): 18073335

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 419, 491, 1257, 1473, 2095, 2455, 2933, 3437, 6285, 7365, 8799, 10311, 14665, 17185, 43995, 51555, 205729, 617187, 1028645, 1440103, 3085935, 4320309, 7200515, 21601545]

約数ペア:

[(1, 21601545), (3, 7200515), (5, 4320309), (7, 3085935), (15, 1440103), (21, 1028645), (35, 617187), (105, 205729), (419, 51555), (491, 43995), (1257, 17185), (1473, 14665), (2095, 10311), (2455, 8799), (2933, 7365), (3437, 6285)]