64551220

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{78721}}^1$

素因数の和:78771

約数の個数: 24

約数和(自身を含む): 138865608

約数和(自身を除く): 74314388

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 78721, 157442, 314884, 393605, 787210, 1574420, 3227561, 6455122, 12910244, 16137805, 32275610, 64551220]

約数ペア:

[(1, 64551220), (2, 32275610), (4, 16137805), (5, 12910244), (10, 6455122), (20, 3227561), (41, 1574420), (82, 787210), (164, 393605), (205, 314884), (410, 157442), (820, 78721)]