65647640

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{4219}}^1$

素因数の和:4619

約数の個数: 32

約数和(自身を含む): 148122000

約数和(自身を除く): 82474360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1556, 1945, 3112, 3890, 4219, 7780, 8438, 15560, 16876, 21095, 33752, 42190, 84380, 168760, 1641191, 3282382, 6564764, 8205955, 13129528, 16411910, 32823820, 65647640]

約数ペア:

[(1, 65647640), (2, 32823820), (4, 16411910), (5, 13129528), (8, 8205955), (10, 6564764), (20, 3282382), (40, 1641191), (389, 168760), (778, 84380), (1556, 42190), (1945, 33752), (3112, 21095), (3890, 16876), (4219, 15560), (7780, 8438)]