81781804

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{311}}^1\times {\mathrm{389}}^1$

素因数の和:730

約数の個数: 36

約数和(自身を含む): 155872080

約数和(自身を除く): 74090276

約数列:

[1, 2, 4, 13, 26, 52, 169, 311, 338, 389, 622, 676, 778, 1244, 1556, 4043, 5057, 8086, 10114, 16172, 20228, 52559, 65741, 105118, 120979, 131482, 210236, 241958, 262964, 483916, 1572727, 3145454, 6290908, 20445451, 40890902, 81781804]

約数ペア:

[(1, 81781804), (2, 40890902), (4, 20445451), (13, 6290908), (26, 3145454), (52, 1572727), (169, 483916), (311, 262964), (338, 241958), (389, 210236), (622, 131482), (676, 120979), (778, 105118), (1244, 65741), (1556, 52559), (4043, 20228), (5057, 16172), (8086, 10114)]