20798180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{479}}^1$

素因数の和:668

約数の個数: 48

約数和(自身を含む): 47416320

約数和(自身を除く): 26618140

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 167, 260, 334, 479, 668, 835, 958, 1670, 1916, 2171, 2395, 3340, 4342, 4790, 6227, 8684, 9580, 10855, 12454, 21710, 24908, 31135, 43420, 62270, 79993, 124540, 159986, 319972, 399965, 799930, 1039909, 1599860, 2079818, 4159636, 5199545, 10399090, 20798180]

約数ペア:

[(1, 20798180), (2, 10399090), (4, 5199545), (5, 4159636), (10, 2079818), (13, 1599860), (20, 1039909), (26, 799930), (52, 399965), (65, 319972), (130, 159986), (167, 124540), (260, 79993), (334, 62270), (479, 43420), (668, 31135), (835, 24908), (958, 21710), (1670, 12454), (1916, 10855), (2171, 9580), (2395, 8684), (3340, 6227), (4342, 4790)]