21018880

素因数分解:

$2^8\times 5^1\times {\mathrm{16421}}^1$

素因数の和:16442

約数の個数: 36

約数和(自身を含む): 50349852

約数和(自身を除く): 29330972

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 16421, 32842, 65684, 82105, 131368, 164210, 262736, 328420, 525472, 656840, 1050944, 1313680, 2101888, 2627360, 4203776, 5254720, 10509440, 21018880]

約数ペア:

[(1, 21018880), (2, 10509440), (4, 5254720), (5, 4203776), (8, 2627360), (10, 2101888), (16, 1313680), (20, 1050944), (32, 656840), (40, 525472), (64, 328420), (80, 262736), (128, 164210), (160, 131368), (256, 82105), (320, 65684), (640, 32842), (1280, 16421)]