21187080

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{229}}^1\times {\mathrm{257}}^1$

素因数の和:503

約数の個数: 96

約数和(自身を含む): 69427800

約数和(自身を除く): 48240720

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 180, 229, 257, 360, 458, 514, 687, 771, 916, 1028, 1145, 1285, 1374, 1542, 1832, 2056, 2061, 2290, 2313, 2570, 2748, 3084, 3435, 3855, 4122, 4580, 4626, 5140, 5496, 6168, 6870, 7710, 8244, 9160, 9252, 10280, 10305, 11565, 13740, 15420, 16488, 18504, 20610, 23130, 27480, 30840, 41220, 46260, 58853, 82440, 92520, 117706, 176559, 235412, 294265, 353118, 470824, 529677, 588530, 706236, 882795, 1059354, 1177060, 1412472, 1765590, 2118708, 2354120, 2648385, 3531180, 4237416, 5296770, 7062360, 10593540, 21187080]

約数ペア:

[(1, 21187080), (2, 10593540), (3, 7062360), (4, 5296770), (5, 4237416), (6, 3531180), (8, 2648385), (9, 2354120), (10, 2118708), (12, 1765590), (15, 1412472), (18, 1177060), (20, 1059354), (24, 882795), (30, 706236), (36, 588530), (40, 529677), (45, 470824), (60, 353118), (72, 294265), (90, 235412), (120, 176559), (180, 117706), (229, 92520), (257, 82440), (360, 58853), (458, 46260), (514, 41220), (687, 30840), (771, 27480), (916, 23130), (1028, 20610), (1145, 18504), (1285, 16488), (1374, 15420), (1542, 13740), (1832, 11565), (2056, 10305), (2061, 10280), (2290, 9252), (2313, 9160), (2570, 8244), (2748, 7710), (3084, 6870), (3435, 6168), (3855, 5496), (4122, 5140), (4580, 4626)]