21620144

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{479}}^1$

素因数の和:538

約数の個数: 80

約数和(自身を含む): 53329920

約数和(自身を除く): 31709776

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 31, 52, 56, 62, 91, 104, 112, 124, 182, 208, 217, 248, 364, 403, 434, 479, 496, 728, 806, 868, 958, 1456, 1612, 1736, 1916, 2821, 3224, 3353, 3472, 3832, 5642, 6227, 6448, 6706, 7664, 11284, 12454, 13412, 14849, 22568, 24908, 26824, 29698, 43589, 45136, 49816, 53648, 59396, 87178, 99632, 103943, 118792, 174356, 193037, 207886, 237584, 348712, 386074, 415772, 697424, 772148, 831544, 1351259, 1544296, 1663088, 2702518, 3088592, 5405036, 10810072, 21620144]

約数ペア:

[(1, 21620144), (2, 10810072), (4, 5405036), (7, 3088592), (8, 2702518), (13, 1663088), (14, 1544296), (16, 1351259), (26, 831544), (28, 772148), (31, 697424), (52, 415772), (56, 386074), (62, 348712), (91, 237584), (104, 207886), (112, 193037), (124, 174356), (182, 118792), (208, 103943), (217, 99632), (248, 87178), (364, 59396), (403, 53648), (434, 49816), (479, 45136), (496, 43589), (728, 29698), (806, 26824), (868, 24908), (958, 22568), (1456, 14849), (1612, 13412), (1736, 12454), (1916, 11284), (2821, 7664), (3224, 6706), (3353, 6448), (3472, 6227), (3832, 5642)]