20787345

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{937}}^1$

素因数の和:994

約数の個数: 48

約数和(自身を含む): 39508560

約数和(自身を除く): 18721215

約数列:

[1, 3, 5, 9, 15, 17, 29, 45, 51, 85, 87, 145, 153, 255, 261, 435, 493, 765, 937, 1305, 1479, 2465, 2811, 4437, 4685, 7395, 8433, 14055, 15929, 22185, 27173, 42165, 47787, 79645, 81519, 135865, 143361, 238935, 244557, 407595, 461941, 716805, 1222785, 1385823, 2309705, 4157469, 6929115, 20787345]

約数ペア:

[(1, 20787345), (3, 6929115), (5, 4157469), (9, 2309705), (15, 1385823), (17, 1222785), (29, 716805), (45, 461941), (51, 407595), (85, 244557), (87, 238935), (145, 143361), (153, 135865), (255, 81519), (261, 79645), (435, 47787), (493, 42165), (765, 27173), (937, 22185), (1305, 15929), (1479, 14055), (2465, 8433), (2811, 7395), (4437, 4685)]