77920760

素因数分解:

$2^3\times 5^1\times {\mathrm{521}}^1\times {\mathrm{3739}}^1$

素因数の和:4271

約数の個数: 32

約数和(自身を含む): 175705200

約数和(自身を除く): 97784440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 521, 1042, 2084, 2605, 3739, 4168, 5210, 7478, 10420, 14956, 18695, 20840, 29912, 37390, 74780, 149560, 1948019, 3896038, 7792076, 9740095, 15584152, 19480190, 38960380, 77920760]

約数ペア:

[(1, 77920760), (2, 38960380), (4, 19480190), (5, 15584152), (8, 9740095), (10, 7792076), (20, 3896038), (40, 1948019), (521, 149560), (1042, 74780), (2084, 37390), (2605, 29912), (3739, 20840), (4168, 18695), (5210, 14956), (7478, 10420)]