21503784

素因数分解:

$2^3\times 3^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{311}}^1$

素因数の和:430

約数の個数: 64

約数和(自身を含む): 56010240

約数和(自身を除く): 34506456

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 43, 67, 86, 129, 134, 172, 201, 258, 268, 311, 344, 402, 516, 536, 622, 804, 933, 1032, 1244, 1608, 1866, 2488, 2881, 3732, 5762, 7464, 8643, 11524, 13373, 17286, 20837, 23048, 26746, 34572, 40119, 41674, 53492, 62511, 69144, 80238, 83348, 106984, 125022, 160476, 166696, 250044, 320952, 500088, 895991, 1791982, 2687973, 3583964, 5375946, 7167928, 10751892, 21503784]

約数ペア:

[(1, 21503784), (2, 10751892), (3, 7167928), (4, 5375946), (6, 3583964), (8, 2687973), (12, 1791982), (24, 895991), (43, 500088), (67, 320952), (86, 250044), (129, 166696), (134, 160476), (172, 125022), (201, 106984), (258, 83348), (268, 80238), (311, 69144), (344, 62511), (402, 53492), (516, 41674), (536, 40119), (622, 34572), (804, 26746), (933, 23048), (1032, 20837), (1244, 17286), (1608, 13373), (1866, 11524), (2488, 8643), (2881, 7464), (3732, 5762)]