81460760

素因数分解:

$2^3\times 5^1\times {\mathrm{239}}^1\times {\mathrm{8521}}^1$

素因数の和:8771

約数の個数: 32

約数和(自身を含む): 184075200

約数和(自身を除く): 102614440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 239, 478, 956, 1195, 1912, 2390, 4780, 8521, 9560, 17042, 34084, 42605, 68168, 85210, 170420, 340840, 2036519, 4073038, 8146076, 10182595, 16292152, 20365190, 40730380, 81460760]

約数ペア:

[(1, 81460760), (2, 40730380), (4, 20365190), (5, 16292152), (8, 10182595), (10, 8146076), (20, 4073038), (40, 2036519), (239, 340840), (478, 170420), (956, 85210), (1195, 68168), (1912, 42605), (2390, 34084), (4780, 17042), (8521, 9560)]