398120140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{20333}}^1$

素因数の和:20442

約数の個数: 48

約数和(自身を含む): 922350240

約数和(自身を除く): 524230100

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 220, 356, 445, 890, 979, 1780, 1958, 3916, 4895, 9790, 19580, 20333, 40666, 81332, 101665, 203330, 223663, 406660, 447326, 894652, 1118315, 1809637, 2236630, 3619274, 4473260, 7238548, 9048185, 18096370, 19906007, 36192740, 39812014, 79624028, 99530035, 199060070, 398120140]

約数ペア:

[(1, 398120140), (2, 199060070), (4, 99530035), (5, 79624028), (10, 39812014), (11, 36192740), (20, 19906007), (22, 18096370), (44, 9048185), (55, 7238548), (89, 4473260), (110, 3619274), (178, 2236630), (220, 1809637), (356, 1118315), (445, 894652), (890, 447326), (979, 406660), (1780, 223663), (1958, 203330), (3916, 101665), (4895, 81332), (9790, 40666), (19580, 20333)]