77721940

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{15121}}^1$

素因数の和:15387

約数の個数: 24

約数和(自身を含む): 163861992

約数和(自身を除く): 86140052

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 5140, 15121, 30242, 60484, 75605, 151210, 302420, 3886097, 7772194, 15544388, 19430485, 38860970, 77721940]

約数ペア:

[(1, 77721940), (2, 38860970), (4, 19430485), (5, 15544388), (10, 7772194), (20, 3886097), (257, 302420), (514, 151210), (1028, 75605), (1285, 60484), (2570, 30242), (5140, 15121)]