19661985

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{241}}^1$

素因数の和:303

約数の個数: 72

約数和(自身を含む): 40885416

約数和(自身を除く): 21223431

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 37, 45, 49, 63, 105, 111, 147, 185, 241, 245, 259, 315, 333, 441, 555, 723, 735, 777, 1205, 1295, 1665, 1687, 1813, 2169, 2205, 2331, 3615, 3885, 5061, 5439, 8435, 8917, 9065, 10845, 11655, 11809, 15183, 16317, 25305, 26751, 27195, 35427, 44585, 59045, 62419, 75915, 80253, 81585, 106281, 133755, 177135, 187257, 312095, 401265, 436933, 531405, 561771, 936285, 1310799, 2184665, 2808855, 3932397, 6553995, 19661985]

約数ペア:

[(1, 19661985), (3, 6553995), (5, 3932397), (7, 2808855), (9, 2184665), (15, 1310799), (21, 936285), (35, 561771), (37, 531405), (45, 436933), (49, 401265), (63, 312095), (105, 187257), (111, 177135), (147, 133755), (185, 106281), (241, 81585), (245, 80253), (259, 75915), (315, 62419), (333, 59045), (441, 44585), (555, 35427), (723, 27195), (735, 26751), (777, 25305), (1205, 16317), (1295, 15183), (1665, 11809), (1687, 11655), (1813, 10845), (2169, 9065), (2205, 8917), (2331, 8435), (3615, 5439), (3885, 5061)]