21695247

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{431}}^1$

素因数の和:508

約数の個数: 48

約数和(自身を含む): 38817792

約数和(自身を除く): 17122545

約数列:

[1, 3, 7, 9, 17, 21, 47, 51, 63, 119, 141, 153, 329, 357, 423, 431, 799, 987, 1071, 1293, 2397, 2961, 3017, 3879, 5593, 7191, 7327, 9051, 16779, 20257, 21981, 27153, 50337, 51289, 60771, 65943, 141799, 153867, 182313, 344369, 425397, 461601, 1033107, 1276191, 2410583, 3099321, 7231749, 21695247]

約数ペア:

[(1, 21695247), (3, 7231749), (7, 3099321), (9, 2410583), (17, 1276191), (21, 1033107), (47, 461601), (51, 425397), (63, 344369), (119, 182313), (141, 153867), (153, 141799), (329, 65943), (357, 60771), (423, 51289), (431, 50337), (799, 27153), (987, 21981), (1071, 20257), (1293, 16779), (2397, 9051), (2961, 7327), (3017, 7191), (3879, 5593)]