18311839

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1$

素因数の和:152

約数の個数: 48

約数和(自身を含む): 25855200

約数和(自身を除く): 7543361

約数列:

[1, 7, 13, 17, 19, 49, 89, 91, 119, 133, 221, 247, 323, 623, 637, 833, 931, 1157, 1513, 1547, 1691, 1729, 2261, 4199, 4361, 8099, 10591, 10829, 11837, 12103, 15827, 19669, 21983, 28747, 29393, 56693, 74137, 82859, 137683, 153881, 201229, 205751, 373711, 963781, 1077167, 1408603, 2615977, 18311839]

約数ペア:

[(1, 18311839), (7, 2615977), (13, 1408603), (17, 1077167), (19, 963781), (49, 373711), (89, 205751), (91, 201229), (119, 153881), (133, 137683), (221, 82859), (247, 74137), (323, 56693), (623, 29393), (637, 28747), (833, 21983), (931, 19669), (1157, 15827), (1513, 12103), (1547, 11837), (1691, 10829), (1729, 10591), (2261, 8099), (4199, 4361)]