20508620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{1277}}^1$

素因数の和:1370

約数の個数: 48

約数和(自身を含む): 47664288

約数和(自身を除く): 27155668

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 73, 110, 146, 220, 292, 365, 730, 803, 1277, 1460, 1606, 2554, 3212, 4015, 5108, 6385, 8030, 12770, 14047, 16060, 25540, 28094, 56188, 70235, 93221, 140470, 186442, 280940, 372884, 466105, 932210, 1025431, 1864420, 2050862, 4101724, 5127155, 10254310, 20508620]

約数ペア:

[(1, 20508620), (2, 10254310), (4, 5127155), (5, 4101724), (10, 2050862), (11, 1864420), (20, 1025431), (22, 932210), (44, 466105), (55, 372884), (73, 280940), (110, 186442), (146, 140470), (220, 93221), (292, 70235), (365, 56188), (730, 28094), (803, 25540), (1277, 16060), (1460, 14047), (1606, 12770), (2554, 8030), (3212, 6385), (4015, 5108)]