19979122880

素因数分解:

$2^6\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1522799}}^1$

素因数の和:1522857

約数の個数: 56

約数和(自身を含む): 48735691200

約数和(自身を除く): 28756568320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 160, 164, 205, 320, 328, 410, 656, 820, 1312, 1640, 2624, 3280, 6560, 13120, 1522799, 3045598, 6091196, 7613995, 12182392, 15227990, 24364784, 30455980, 48729568, 60911960, 62434759, 97459136, 121823920, 124869518, 243647840, 249739036, 312173795, 487295680, 499478072, 624347590, 998956144, 1248695180, 1997912288, 2497390360, 3995824576, 4994780720, 9989561440, 19979122880]

約数ペア:

[(1, 19979122880), (2, 9989561440), (4, 4994780720), (5, 3995824576), (8, 2497390360), (10, 1997912288), (16, 1248695180), (20, 998956144), (32, 624347590), (40, 499478072), (41, 487295680), (64, 312173795), (80, 249739036), (82, 243647840), (160, 124869518), (164, 121823920), (205, 97459136), (320, 62434759), (328, 60911960), (410, 48729568), (656, 30455980), (820, 24364784), (1312, 15227990), (1640, 12182392), (2624, 7613995), (3280, 6091196), (6560, 3045598), (13120, 1522799)]