81955555

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1$

素因数の和:196

約数の個数: 64

約数和(自身を含む): 122923008

約数和(自身を除く): 40967453

約数列:

[1, 5, 11, 17, 23, 37, 55, 85, 103, 115, 185, 187, 253, 391, 407, 515, 629, 851, 935, 1133, 1265, 1751, 1955, 2035, 2369, 3145, 3811, 4255, 4301, 5665, 6919, 8755, 9361, 11845, 14467, 19055, 19261, 21505, 26059, 34595, 40273, 41921, 46805, 64787, 72335, 87653, 96305, 130295, 159137, 201365, 209605, 323935, 438265, 443003, 712657, 795685, 964183, 1490101, 2215015, 3563285, 4820915, 7450505, 16391111, 81955555]

約数ペア:

[(1, 81955555), (5, 16391111), (11, 7450505), (17, 4820915), (23, 3563285), (37, 2215015), (55, 1490101), (85, 964183), (103, 795685), (115, 712657), (185, 443003), (187, 438265), (253, 323935), (391, 209605), (407, 201365), (515, 159137), (629, 130295), (851, 96305), (935, 87653), (1133, 72335), (1265, 64787), (1751, 46805), (1955, 41921), (2035, 40273), (2369, 34595), (3145, 26059), (3811, 21505), (4255, 19261), (4301, 19055), (5665, 14467), (6919, 11845), (8755, 9361)]