20778628

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{21031}}^1$

素因数の和:21067

約数の個数: 24

約数和(自身を含む): 41222720

約数和(自身を除く): 20444092

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 247, 494, 988, 21031, 42062, 84124, 273403, 399589, 546806, 799178, 1093612, 1598356, 5194657, 10389314, 20778628]

約数ペア:

[(1, 20778628), (2, 10389314), (4, 5194657), (13, 1598356), (19, 1093612), (26, 799178), (38, 546806), (52, 399589), (76, 273403), (247, 84124), (494, 42062), (988, 21031)]