21214720

素因数分解:

$2^9\times 5^1\times {\mathrm{8287}}^1$

素因数の和:8310

約数の個数: 40

約数和(自身を含む): 50871744

約数和(自身を除く): 29657024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 8287, 16574, 33148, 41435, 66296, 82870, 132592, 165740, 265184, 331480, 530368, 662960, 1060736, 1325920, 2121472, 2651840, 4242944, 5303680, 10607360, 21214720]

約数ペア:

[(1, 21214720), (2, 10607360), (4, 5303680), (5, 4242944), (8, 2651840), (10, 2121472), (16, 1325920), (20, 1060736), (32, 662960), (40, 530368), (64, 331480), (80, 265184), (128, 165740), (160, 132592), (256, 82870), (320, 66296), (512, 41435), (640, 33148), (1280, 16574), (2560, 8287)]