18768980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{487}}^1$

素因数の和:584

約数の個数: 48

約数和(自身を含む): 41319936

約数和(自身を除く): 22550956

約数列:

[1, 2, 4, 5, 10, 20, 41, 47, 82, 94, 164, 188, 205, 235, 410, 470, 487, 820, 940, 974, 1927, 1948, 2435, 3854, 4870, 7708, 9635, 9740, 19270, 19967, 22889, 38540, 39934, 45778, 79868, 91556, 99835, 114445, 199670, 228890, 399340, 457780, 938449, 1876898, 3753796, 4692245, 9384490, 18768980]

約数ペア:

[(1, 18768980), (2, 9384490), (4, 4692245), (5, 3753796), (10, 1876898), (20, 938449), (41, 457780), (47, 399340), (82, 228890), (94, 199670), (164, 114445), (188, 99835), (205, 91556), (235, 79868), (410, 45778), (470, 39934), (487, 38540), (820, 22889), (940, 19967), (974, 19270), (1927, 9740), (1948, 9635), (2435, 7708), (3854, 4870)]