21554533

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{353}}^1$

素因数の和:445

約数の個数: 32

約数和(自身を含む): 29498112

約数和(自身を除く): 7943579

約数列:

[1, 7, 11, 13, 61, 77, 91, 143, 353, 427, 671, 793, 1001, 2471, 3883, 4589, 4697, 5551, 8723, 21533, 27181, 32123, 50479, 61061, 150731, 236863, 279929, 353353, 1658041, 1959503, 3079219, 21554533]

約数ペア:

[(1, 21554533), (7, 3079219), (11, 1959503), (13, 1658041), (61, 353353), (77, 279929), (91, 236863), (143, 150731), (353, 61061), (427, 50479), (671, 32123), (793, 27181), (1001, 21533), (2471, 8723), (3883, 5551), (4589, 4697)]