81426880

素因数分解:

$2^6\times 5^1\times {\mathrm{79}}^1\times {\mathrm{3221}}^1$

素因数の和:3317

約数の個数: 56

約数和(自身を含む): 196413120

約数和(自身を除く): 114986240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 158, 160, 316, 320, 395, 632, 790, 1264, 1580, 2528, 3160, 3221, 5056, 6320, 6442, 12640, 12884, 16105, 25280, 25768, 32210, 51536, 64420, 103072, 128840, 206144, 254459, 257680, 508918, 515360, 1017836, 1030720, 1272295, 2035672, 2544590, 4071344, 5089180, 8142688, 10178360, 16285376, 20356720, 40713440, 81426880]

約数ペア:

[(1, 81426880), (2, 40713440), (4, 20356720), (5, 16285376), (8, 10178360), (10, 8142688), (16, 5089180), (20, 4071344), (32, 2544590), (40, 2035672), (64, 1272295), (79, 1030720), (80, 1017836), (158, 515360), (160, 508918), (316, 257680), (320, 254459), (395, 206144), (632, 128840), (790, 103072), (1264, 64420), (1580, 51536), (2528, 32210), (3160, 25768), (3221, 25280), (5056, 16105), (6320, 12884), (6442, 12640)]