81583880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{291371}}^1$

素因数の和:291389

約数の個数: 32

約数和(自身を含む): 209787840

約数和(自身を除く): 128203960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 291371, 582742, 1165484, 1456855, 2039597, 2330968, 2913710, 4079194, 5827420, 8158388, 10197985, 11654840, 16316776, 20395970, 40791940, 81583880]

約数ペア:

[(1, 81583880), (2, 40791940), (4, 20395970), (5, 16316776), (7, 11654840), (8, 10197985), (10, 8158388), (14, 5827420), (20, 4079194), (28, 2913710), (35, 2330968), (40, 2039597), (56, 1456855), (70, 1165484), (140, 582742), (280, 291371)]