81607880

素因数分解:

$2^3\times 5^1\times {\mathrm{359}}^1\times {\mathrm{5683}}^1$

素因数の和:6053

約数の個数: 32

約数和(自身を含む): 184161600

約数和(自身を除く): 102553720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 359, 718, 1436, 1795, 2872, 3590, 5683, 7180, 11366, 14360, 22732, 28415, 45464, 56830, 113660, 227320, 2040197, 4080394, 8160788, 10200985, 16321576, 20401970, 40803940, 81607880]

約数ペア:

[(1, 81607880), (2, 40803940), (4, 20401970), (5, 16321576), (8, 10200985), (10, 8160788), (20, 4080394), (40, 2040197), (359, 227320), (718, 113660), (1436, 56830), (1795, 45464), (2872, 28415), (3590, 22732), (5683, 14360), (7180, 11366)]