20999788940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1718477}}^1$

素因数の和:1718546

約数の個数: 48

約数和(自身を含む): 48502323072

約数和(自身を除く): 27502534132

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 47, 52, 65, 94, 130, 188, 235, 260, 470, 611, 940, 1222, 2444, 3055, 6110, 12220, 1718477, 3436954, 6873908, 8592385, 17184770, 22340201, 34369540, 44680402, 80768419, 89360804, 111701005, 161536838, 223402010, 323073676, 403842095, 446804020, 807684190, 1049989447, 1615368380, 2099978894, 4199957788, 5249947235, 10499894470, 20999788940]

約数ペア:

[(1, 20999788940), (2, 10499894470), (4, 5249947235), (5, 4199957788), (10, 2099978894), (13, 1615368380), (20, 1049989447), (26, 807684190), (47, 446804020), (52, 403842095), (65, 323073676), (94, 223402010), (130, 161536838), (188, 111701005), (235, 89360804), (260, 80768419), (470, 44680402), (611, 34369540), (940, 22340201), (1222, 17184770), (2444, 8592385), (3055, 6873908), (6110, 3436954), (12220, 1718477)]