81968120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{283}}^1\times {\mathrm{557}}^1$

素因数の和:864

約数の個数: 64

約数和(自身を含む): 199674720

約数和(自身を除く): 117706600

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 283, 520, 557, 566, 1114, 1132, 1415, 2228, 2264, 2785, 2830, 3679, 4456, 5570, 5660, 7241, 7358, 11140, 11320, 14482, 14716, 18395, 22280, 28964, 29432, 36205, 36790, 57928, 72410, 73580, 144820, 147160, 157631, 289640, 315262, 630524, 788155, 1261048, 1576310, 2049203, 3152620, 4098406, 6305240, 8196812, 10246015, 16393624, 20492030, 40984060, 81968120]

約数ペア:

[(1, 81968120), (2, 40984060), (4, 20492030), (5, 16393624), (8, 10246015), (10, 8196812), (13, 6305240), (20, 4098406), (26, 3152620), (40, 2049203), (52, 1576310), (65, 1261048), (104, 788155), (130, 630524), (260, 315262), (283, 289640), (520, 157631), (557, 147160), (566, 144820), (1114, 73580), (1132, 72410), (1415, 57928), (2228, 36790), (2264, 36205), (2785, 29432), (2830, 28964), (3679, 22280), (4456, 18395), (5570, 14716), (5660, 14482), (7241, 11320), (7358, 11140)]