218928520

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{133493}}^1$

素因数の和:133545

約数の個数: 32

約数和(自身を含む): 504607320

約数和(自身を除く): 285678800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 133493, 266986, 533972, 667465, 1067944, 1334930, 2669860, 5339720, 5473213, 10946426, 21892852, 27366065, 43785704, 54732130, 109464260, 218928520]

約数ペア:

[(1, 218928520), (2, 109464260), (4, 54732130), (5, 43785704), (8, 27366065), (10, 21892852), (20, 10946426), (40, 5473213), (41, 5339720), (82, 2669860), (164, 1334930), (205, 1067944), (328, 667465), (410, 533972), (820, 266986), (1640, 133493)]