19997328

素因数分解:

$2^4\times 3^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{439}}^1$

素因数の和:536

約数の個数: 80

約数和(自身を含む): 56524160

約数和(自身を除く): 36526832

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 39, 48, 52, 73, 78, 104, 146, 156, 208, 219, 292, 312, 438, 439, 584, 624, 876, 878, 949, 1168, 1317, 1752, 1756, 1898, 2634, 2847, 3504, 3512, 3796, 5268, 5694, 5707, 7024, 7592, 10536, 11388, 11414, 15184, 17121, 21072, 22776, 22828, 32047, 34242, 45552, 45656, 64094, 68484, 91312, 96141, 128188, 136968, 192282, 256376, 273936, 384564, 416611, 512752, 769128, 833222, 1249833, 1538256, 1666444, 2499666, 3332888, 4999332, 6665776, 9998664, 19997328]

約数ペア:

[(1, 19997328), (2, 9998664), (3, 6665776), (4, 4999332), (6, 3332888), (8, 2499666), (12, 1666444), (13, 1538256), (16, 1249833), (24, 833222), (26, 769128), (39, 512752), (48, 416611), (52, 384564), (73, 273936), (78, 256376), (104, 192282), (146, 136968), (156, 128188), (208, 96141), (219, 91312), (292, 68484), (312, 64094), (438, 45656), (439, 45552), (584, 34242), (624, 32047), (876, 22828), (878, 22776), (949, 21072), (1168, 17121), (1317, 15184), (1752, 11414), (1756, 11388), (1898, 10536), (2634, 7592), (2847, 7024), (3504, 5707), (3512, 5694), (3796, 5268)]