19908720

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{709}}^1$

素因数の和:744

約数の個数: 160

約数和(自身を含む): 73953600

約数和(自身を除く): 54044880

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 20, 24, 26, 27, 30, 36, 39, 40, 45, 48, 52, 54, 60, 65, 72, 78, 80, 90, 104, 108, 117, 120, 130, 135, 144, 156, 180, 195, 208, 216, 234, 240, 260, 270, 312, 351, 360, 390, 432, 468, 520, 540, 585, 624, 702, 709, 720, 780, 936, 1040, 1080, 1170, 1404, 1418, 1560, 1755, 1872, 2127, 2160, 2340, 2808, 2836, 3120, 3510, 3545, 4254, 4680, 5616, 5672, 6381, 7020, 7090, 8508, 9217, 9360, 10635, 11344, 12762, 14040, 14180, 17016, 18434, 19143, 21270, 25524, 27651, 28080, 28360, 31905, 34032, 36868, 38286, 42540, 46085, 51048, 55302, 56720, 63810, 73736, 76572, 82953, 85080, 92170, 95715, 102096, 110604, 127620, 138255, 147472, 153144, 165906, 170160, 184340, 191430, 221208, 248859, 255240, 276510, 306288, 331812, 368680, 382860, 414765, 442416, 497718, 510480, 553020, 663624, 737360, 765720, 829530, 995436, 1106040, 1244295, 1327248, 1531440, 1659060, 1990872, 2212080, 2488590, 3318120, 3981744, 4977180, 6636240, 9954360, 19908720]

約数ペア:

[(1, 19908720), (2, 9954360), (3, 6636240), (4, 4977180), (5, 3981744), (6, 3318120), (8, 2488590), (9, 2212080), (10, 1990872), (12, 1659060), (13, 1531440), (15, 1327248), (16, 1244295), (18, 1106040), (20, 995436), (24, 829530), (26, 765720), (27, 737360), (30, 663624), (36, 553020), (39, 510480), (40, 497718), (45, 442416), (48, 414765), (52, 382860), (54, 368680), (60, 331812), (65, 306288), (72, 276510), (78, 255240), (80, 248859), (90, 221208), (104, 191430), (108, 184340), (117, 170160), (120, 165906), (130, 153144), (135, 147472), (144, 138255), (156, 127620), (180, 110604), (195, 102096), (208, 95715), (216, 92170), (234, 85080), (240, 82953), (260, 76572), (270, 73736), (312, 63810), (351, 56720), (360, 55302), (390, 51048), (432, 46085), (468, 42540), (520, 38286), (540, 36868), (585, 34032), (624, 31905), (702, 28360), (709, 28080), (720, 27651), (780, 25524), (936, 21270), (1040, 19143), (1080, 18434), (1170, 17016), (1404, 14180), (1418, 14040), (1560, 12762), (1755, 11344), (1872, 10635), (2127, 9360), (2160, 9217), (2340, 8508), (2808, 7090), (2836, 7020), (3120, 6381), (3510, 5672), (3545, 5616), (4254, 4680)]