20898020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{7307}}^1$

素因数の和:7340

約数の個数: 48

約数和(自身を含む): 51565248

約数和(自身を除く): 30667228

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 7307, 14614, 29228, 36535, 73070, 80377, 94991, 146140, 160754, 189982, 321508, 379964, 401885, 474955, 803770, 949910, 1044901, 1607540, 1899820, 2089802, 4179604, 5224505, 10449010, 20898020]

約数ペア:

[(1, 20898020), (2, 10449010), (4, 5224505), (5, 4179604), (10, 2089802), (11, 1899820), (13, 1607540), (20, 1044901), (22, 949910), (26, 803770), (44, 474955), (52, 401885), (55, 379964), (65, 321508), (110, 189982), (130, 160754), (143, 146140), (220, 94991), (260, 80377), (286, 73070), (572, 36535), (715, 29228), (1430, 14614), (2860, 7307)]