31818787

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{239}}^1$

素因数の和:296

約数の個数: 48

約数和(自身を含む): 45964800

約数和(自身を除く): 14146013

約数列:

[1, 7, 11, 13, 19, 49, 77, 91, 133, 143, 209, 239, 247, 539, 637, 931, 1001, 1463, 1673, 1729, 2629, 2717, 3107, 4541, 7007, 10241, 11711, 12103, 18403, 19019, 21749, 31787, 34177, 49951, 59033, 128821, 133133, 152243, 222509, 239239, 349657, 413231, 649363, 1674673, 2447599, 2892617, 4545541, 31818787]

約数ペア:

[(1, 31818787), (7, 4545541), (11, 2892617), (13, 2447599), (19, 1674673), (49, 649363), (77, 413231), (91, 349657), (133, 239239), (143, 222509), (209, 152243), (239, 133133), (247, 128821), (539, 59033), (637, 49951), (931, 34177), (1001, 31787), (1463, 21749), (1673, 19019), (1729, 18403), (2629, 12103), (2717, 11711), (3107, 10241), (4541, 7007)]