20684590

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{647}}^1$

素因数の和:816

約数の個数: 32

約数和(自身を含む): 39191040

約数和(自身を除く): 18506450

約数列:

[1, 2, 5, 10, 23, 46, 115, 139, 230, 278, 647, 695, 1294, 1390, 3197, 3235, 6394, 6470, 14881, 15985, 29762, 31970, 74405, 89933, 148810, 179866, 449665, 899330, 2068459, 4136918, 10342295, 20684590]

約数ペア:

[(1, 20684590), (2, 10342295), (5, 4136918), (10, 2068459), (23, 899330), (46, 449665), (115, 179866), (139, 148810), (230, 89933), (278, 74405), (647, 31970), (695, 29762), (1294, 15985), (1390, 14881), (3197, 6470), (3235, 6394)]