19476820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{223}}^1\times {\mathrm{397}}^1$

素因数の和:640

約数の個数: 48

約数和(自身を含む): 44932608

約数和(自身を除く): 25455788

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 223, 397, 446, 794, 892, 1115, 1588, 1985, 2230, 2453, 3970, 4367, 4460, 4906, 7940, 8734, 9812, 12265, 17468, 21835, 24530, 43670, 49060, 87340, 88531, 177062, 354124, 442655, 885310, 973841, 1770620, 1947682, 3895364, 4869205, 9738410, 19476820]

約数ペア:

[(1, 19476820), (2, 9738410), (4, 4869205), (5, 3895364), (10, 1947682), (11, 1770620), (20, 973841), (22, 885310), (44, 442655), (55, 354124), (110, 177062), (220, 88531), (223, 87340), (397, 49060), (446, 43670), (794, 24530), (892, 21835), (1115, 17468), (1588, 12265), (1985, 9812), (2230, 8734), (2453, 7940), (3970, 4906), (4367, 4460)]