21156520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{6869}}^1$

素因数の和:6898

約数の個数: 64

約数和(自身を含む): 59356800

約数和(自身を除く): 38200280

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 88, 110, 140, 154, 220, 280, 308, 385, 440, 616, 770, 1540, 3080, 6869, 13738, 27476, 34345, 48083, 54952, 68690, 75559, 96166, 137380, 151118, 192332, 240415, 274760, 302236, 377795, 384664, 480830, 528913, 604472, 755590, 961660, 1057826, 1511180, 1923320, 2115652, 2644565, 3022360, 4231304, 5289130, 10578260, 21156520]

約数ペア:

[(1, 21156520), (2, 10578260), (4, 5289130), (5, 4231304), (7, 3022360), (8, 2644565), (10, 2115652), (11, 1923320), (14, 1511180), (20, 1057826), (22, 961660), (28, 755590), (35, 604472), (40, 528913), (44, 480830), (55, 384664), (56, 377795), (70, 302236), (77, 274760), (88, 240415), (110, 192332), (140, 151118), (154, 137380), (220, 96166), (280, 75559), (308, 68690), (385, 54952), (440, 48083), (616, 34345), (770, 27476), (1540, 13738), (3080, 6869)]