641706940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{654803}}^1$

素因数の和:654826

約数の個数: 36

約数和(自身を含む): 1567600776

約数和(自身を除く): 925893836

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 654803, 1309606, 2619212, 3274015, 4583621, 6548030, 9167242, 13096060, 18334484, 22918105, 32085347, 45836210, 64170694, 91672420, 128341388, 160426735, 320853470, 641706940]

約数ペア:

[(1, 641706940), (2, 320853470), (4, 160426735), (5, 128341388), (7, 91672420), (10, 64170694), (14, 45836210), (20, 32085347), (28, 22918105), (35, 18334484), (49, 13096060), (70, 9167242), (98, 6548030), (140, 4583621), (196, 3274015), (245, 2619212), (490, 1309606), (980, 654803)]