20388015

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{919}}^1$

素因数の和:976

約数の個数: 48

約数和(自身を含む): 38750400

約数和(自身を除く): 18362385

約数列:

[1, 3, 5, 9, 15, 17, 29, 45, 51, 85, 87, 145, 153, 255, 261, 435, 493, 765, 919, 1305, 1479, 2465, 2757, 4437, 4595, 7395, 8271, 13785, 15623, 22185, 26651, 41355, 46869, 78115, 79953, 133255, 140607, 234345, 239859, 399765, 453067, 703035, 1199295, 1359201, 2265335, 4077603, 6796005, 20388015]

約数ペア:

[(1, 20388015), (3, 6796005), (5, 4077603), (9, 2265335), (15, 1359201), (17, 1199295), (29, 703035), (45, 453067), (51, 399765), (85, 239859), (87, 234345), (145, 140607), (153, 133255), (255, 79953), (261, 78115), (435, 46869), (493, 41355), (765, 26651), (919, 22185), (1305, 15623), (1479, 13785), (2465, 8271), (2757, 7395), (4437, 4595)]