19986615

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{313}}^1$

素因数の和:381

約数の個数: 64

約数和(自身を含む): 39790080

約数和(自身を除く): 19803465

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 43, 45, 55, 99, 129, 135, 165, 215, 297, 313, 387, 473, 495, 645, 939, 1161, 1419, 1485, 1565, 1935, 2365, 2817, 3443, 4257, 4695, 5805, 7095, 8451, 10329, 12771, 13459, 14085, 17215, 21285, 30987, 40377, 42255, 51645, 63855, 67295, 92961, 121131, 148049, 154935, 201885, 363393, 444147, 464805, 605655, 740245, 1332441, 1816965, 2220735, 3997323, 6662205, 19986615]

約数ペア:

[(1, 19986615), (3, 6662205), (5, 3997323), (9, 2220735), (11, 1816965), (15, 1332441), (27, 740245), (33, 605655), (43, 464805), (45, 444147), (55, 363393), (99, 201885), (129, 154935), (135, 148049), (165, 121131), (215, 92961), (297, 67295), (313, 63855), (387, 51645), (473, 42255), (495, 40377), (645, 30987), (939, 21285), (1161, 17215), (1419, 14085), (1485, 13459), (1565, 12771), (1935, 10329), (2365, 8451), (2817, 7095), (3443, 5805), (4257, 4695)]