64489720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{39323}}^1$

素因数の和:39375

約数の個数: 32

約数和(自身を含む): 148644720

約数和(自身を除く): 84155000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 39323, 78646, 157292, 196615, 314584, 393230, 786460, 1572920, 1612243, 3224486, 6448972, 8061215, 12897944, 16122430, 32244860, 64489720]

約数ペア:

[(1, 64489720), (2, 32244860), (4, 16122430), (5, 12897944), (8, 8061215), (10, 6448972), (20, 3224486), (40, 1612243), (41, 1572920), (82, 786460), (164, 393230), (205, 314584), (328, 196615), (410, 157292), (820, 78646), (1640, 39323)]