19711458

素因数分解:

$2^1\times 3^3\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{653}}^1$

素因数の和:720

約数の個数: 64

約数和(自身を含む): 48343680

約数和(自身を除く): 28632222

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 27, 39, 43, 54, 78, 86, 117, 129, 234, 258, 351, 387, 559, 653, 702, 774, 1118, 1161, 1306, 1677, 1959, 2322, 3354, 3918, 5031, 5877, 8489, 10062, 11754, 15093, 16978, 17631, 25467, 28079, 30186, 35262, 50934, 56158, 76401, 84237, 152802, 168474, 229203, 252711, 365027, 458406, 505422, 730054, 758133, 1095081, 1516266, 2190162, 3285243, 6570486, 9855729, 19711458]

約数ペア:

[(1, 19711458), (2, 9855729), (3, 6570486), (6, 3285243), (9, 2190162), (13, 1516266), (18, 1095081), (26, 758133), (27, 730054), (39, 505422), (43, 458406), (54, 365027), (78, 252711), (86, 229203), (117, 168474), (129, 152802), (234, 84237), (258, 76401), (351, 56158), (387, 50934), (559, 35262), (653, 30186), (702, 28079), (774, 25467), (1118, 17631), (1161, 16978), (1306, 15093), (1677, 11754), (1959, 10062), (2322, 8489), (3354, 5877), (3918, 5031)]