208515905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{277}}^1\times {\mathrm{313}}^1$

素因数の和:645

約数の個数: 32

約数和(自身を含む): 278636064

約数和(自身を除く): 70120159

約数列:

[1, 5, 13, 37, 65, 185, 277, 313, 481, 1385, 1565, 2405, 3601, 4069, 10249, 11581, 18005, 20345, 51245, 57905, 86701, 133237, 150553, 433505, 666185, 752765, 1127113, 3207937, 5635565, 16039685, 41703181, 208515905]

約数ペア:

[(1, 208515905), (5, 41703181), (13, 16039685), (37, 5635565), (65, 3207937), (185, 1127113), (277, 752765), (313, 666185), (481, 433505), (1385, 150553), (1565, 133237), (2405, 86701), (3601, 57905), (4069, 51245), (10249, 20345), (11581, 18005)]