20355885

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1$

素因数の和:139

約数の個数: 96

約数和(自身を含む): 42456960

約数和(自身を除く): 22101075

約数列:

[1, 3, 5, 9, 11, 15, 17, 33, 41, 45, 51, 55, 59, 85, 99, 123, 153, 165, 177, 187, 205, 255, 295, 369, 451, 495, 531, 561, 615, 649, 697, 765, 885, 935, 1003, 1353, 1683, 1845, 1947, 2091, 2255, 2419, 2655, 2805, 3009, 3245, 3485, 4059, 5015, 5841, 6273, 6765, 7257, 7667, 8415, 9027, 9735, 10455, 11033, 12095, 15045, 20295, 21771, 23001, 26609, 29205, 31365, 33099, 36285, 38335, 41123, 45135, 55165, 69003, 79827, 99297, 108855, 115005, 123369, 133045, 165495, 205615, 239481, 345015, 370107, 399135, 452353, 496485, 616845, 1197405, 1357059, 1850535, 2261765, 4071177, 6785295, 20355885]

約数ペア:

[(1, 20355885), (3, 6785295), (5, 4071177), (9, 2261765), (11, 1850535), (15, 1357059), (17, 1197405), (33, 616845), (41, 496485), (45, 452353), (51, 399135), (55, 370107), (59, 345015), (85, 239481), (99, 205615), (123, 165495), (153, 133045), (165, 123369), (177, 115005), (187, 108855), (205, 99297), (255, 79827), (295, 69003), (369, 55165), (451, 45135), (495, 41123), (531, 38335), (561, 36285), (615, 33099), (649, 31365), (697, 29205), (765, 26609), (885, 23001), (935, 21771), (1003, 20295), (1353, 15045), (1683, 12095), (1845, 11033), (1947, 10455), (2091, 9735), (2255, 9027), (2419, 8415), (2655, 7667), (2805, 7257), (3009, 6765), (3245, 6273), (3485, 5841), (4059, 5015)]