79780820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{81409}}^1$

素因数の和:81432

約数の個数: 36

約数和(自身を含む): 194895540

約数和(自身を除く): 115114720

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 81409, 162818, 325636, 407045, 569863, 814090, 1139726, 1628180, 2279452, 2849315, 3989041, 5698630, 7978082, 11397260, 15956164, 19945205, 39890410, 79780820]

約数ペア:

[(1, 79780820), (2, 39890410), (4, 19945205), (5, 15956164), (7, 11397260), (10, 7978082), (14, 5698630), (20, 3989041), (28, 2849315), (35, 2279452), (49, 1628180), (70, 1139726), (98, 814090), (140, 569863), (196, 407045), (245, 325636), (490, 162818), (980, 81409)]