19721468

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{19961}}^1$

素因数の和:19997

約数の個数: 24

約数和(自身を含む): 39125520

約数和(自身を除く): 19404052

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 247, 494, 988, 19961, 39922, 79844, 259493, 379259, 518986, 758518, 1037972, 1517036, 4930367, 9860734, 19721468]

約数ペア:

[(1, 19721468), (2, 9860734), (4, 4930367), (13, 1517036), (19, 1037972), (26, 758518), (38, 518986), (52, 379259), (76, 259493), (247, 79844), (494, 39922), (988, 19961)]