66408520

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{40493}}^1$

素因数の和:40545

約数の個数: 32

約数和(自身を含む): 153067320

約数和(自身を除く): 86658800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 40493, 80986, 161972, 202465, 323944, 404930, 809860, 1619720, 1660213, 3320426, 6640852, 8301065, 13281704, 16602130, 33204260, 66408520]

約数ペア:

[(1, 66408520), (2, 33204260), (4, 16602130), (5, 13281704), (8, 8301065), (10, 6640852), (20, 3320426), (40, 1660213), (41, 1619720), (82, 809860), (164, 404930), (205, 323944), (328, 202465), (410, 161972), (820, 80986), (1640, 40493)]