78423880

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{4657}}^1$

素因数の和:5089

約数の個数: 32

約数和(自身を含む): 176910840

約数和(自身を除く): 98486960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1684, 2105, 3368, 4210, 4657, 8420, 9314, 16840, 18628, 23285, 37256, 46570, 93140, 186280, 1960597, 3921194, 7842388, 9802985, 15684776, 19605970, 39211940, 78423880]

約数ペア:

[(1, 78423880), (2, 39211940), (4, 19605970), (5, 15684776), (8, 9802985), (10, 7842388), (20, 3921194), (40, 1960597), (421, 186280), (842, 93140), (1684, 46570), (2105, 37256), (3368, 23285), (4210, 18628), (4657, 16840), (8420, 9314)]