19977328

素因数分解:

$2^4\times 7^1\times {\mathrm{107}}^1\times {\mathrm{1667}}^1$

素因数の和:1789

約数の個数: 40

約数和(自身を含む): 44675712

約数和(自身を除く): 24698384

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 107, 112, 214, 428, 749, 856, 1498, 1667, 1712, 2996, 3334, 5992, 6668, 11669, 11984, 13336, 23338, 26672, 46676, 93352, 178369, 186704, 356738, 713476, 1248583, 1426952, 2497166, 2853904, 4994332, 9988664, 19977328]

約数ペア:

[(1, 19977328), (2, 9988664), (4, 4994332), (7, 2853904), (8, 2497166), (14, 1426952), (16, 1248583), (28, 713476), (56, 356738), (107, 186704), (112, 178369), (214, 93352), (428, 46676), (749, 26672), (856, 23338), (1498, 13336), (1667, 11984), (1712, 11669), (2996, 6668), (3334, 5992)]