720409820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{213139}}^1$

素因数の和:213174

約数の個数: 36

約数和(自身を含む): 1638194040

約数和(自身を除く): 917784220

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 213139, 426278, 852556, 1065695, 2131390, 2770807, 4262780, 5541614, 11083228, 13854035, 27708070, 36020491, 55416140, 72040982, 144081964, 180102455, 360204910, 720409820]

約数ペア:

[(1, 720409820), (2, 360204910), (4, 180102455), (5, 144081964), (10, 72040982), (13, 55416140), (20, 36020491), (26, 27708070), (52, 13854035), (65, 11083228), (130, 5541614), (169, 4262780), (260, 2770807), (338, 2131390), (676, 1065695), (845, 852556), (1690, 426278), (3380, 213139)]