80640664

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1$

素因数の和:320

約数の個数: 64

約数和(自身を含む): 168618240

約数和(自身を除く): 87977576

約数列:

[1, 2, 4, 8, 13, 26, 52, 67, 71, 104, 134, 142, 163, 268, 284, 326, 536, 568, 652, 871, 923, 1304, 1742, 1846, 2119, 3484, 3692, 4238, 4757, 6968, 7384, 8476, 9514, 10921, 11573, 16952, 19028, 21842, 23146, 38056, 43684, 46292, 61841, 87368, 92584, 123682, 141973, 150449, 247364, 283946, 300898, 494728, 567892, 601796, 775391, 1135784, 1203592, 1550782, 3101564, 6203128, 10080083, 20160166, 40320332, 80640664]

約数ペア:

[(1, 80640664), (2, 40320332), (4, 20160166), (8, 10080083), (13, 6203128), (26, 3101564), (52, 1550782), (67, 1203592), (71, 1135784), (104, 775391), (134, 601796), (142, 567892), (163, 494728), (268, 300898), (284, 283946), (326, 247364), (536, 150449), (568, 141973), (652, 123682), (871, 92584), (923, 87368), (1304, 61841), (1742, 46292), (1846, 43684), (2119, 38056), (3484, 23146), (3692, 21842), (4238, 19028), (4757, 16952), (6968, 11573), (7384, 10921), (8476, 9514)]