21880638

素因数分解:

$2^1\times 3^3\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{439}}^1$

素因数の和:534

約数の個数: 64

約数和(自身を含む): 53222400

約数和(自身を除く): 31341762

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 27, 39, 54, 71, 78, 117, 142, 213, 234, 351, 426, 439, 639, 702, 878, 923, 1278, 1317, 1846, 1917, 2634, 2769, 3834, 3951, 5538, 5707, 7902, 8307, 11414, 11853, 16614, 17121, 23706, 24921, 31169, 34242, 49842, 51363, 62338, 93507, 102726, 154089, 187014, 280521, 308178, 405197, 561042, 810394, 841563, 1215591, 1683126, 2431182, 3646773, 7293546, 10940319, 21880638]

約数ペア:

[(1, 21880638), (2, 10940319), (3, 7293546), (6, 3646773), (9, 2431182), (13, 1683126), (18, 1215591), (26, 841563), (27, 810394), (39, 561042), (54, 405197), (71, 308178), (78, 280521), (117, 187014), (142, 154089), (213, 102726), (234, 93507), (351, 62338), (426, 51363), (439, 49842), (639, 34242), (702, 31169), (878, 24921), (923, 23706), (1278, 17121), (1317, 16614), (1846, 11853), (1917, 11414), (2634, 8307), (2769, 7902), (3834, 5707), (3951, 5538)]