16721440

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{2549}}^1$

素因数の和:2605

約数の個数: 48

約数和(自身を含む): 40483800

約数和(自身を除く): 23762360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 80, 82, 160, 164, 205, 328, 410, 656, 820, 1312, 1640, 2549, 3280, 5098, 6560, 10196, 12745, 20392, 25490, 40784, 50980, 81568, 101960, 104509, 203920, 209018, 407840, 418036, 522545, 836072, 1045090, 1672144, 2090180, 3344288, 4180360, 8360720, 16721440]

約数ペア:

[(1, 16721440), (2, 8360720), (4, 4180360), (5, 3344288), (8, 2090180), (10, 1672144), (16, 1045090), (20, 836072), (32, 522545), (40, 418036), (41, 407840), (80, 209018), (82, 203920), (160, 104509), (164, 101960), (205, 81568), (328, 50980), (410, 40784), (656, 25490), (820, 20392), (1312, 12745), (1640, 10196), (2549, 6560), (3280, 5098)]