21175804

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{21433}}^1$

素因数の和:21469

約数の個数: 24

約数和(自身を含む): 42010640

約数和(自身を除く): 20834836

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 247, 494, 988, 21433, 42866, 85732, 278629, 407227, 557258, 814454, 1114516, 1628908, 5293951, 10587902, 21175804]

約数ペア:

[(1, 21175804), (2, 10587902), (4, 5293951), (13, 1628908), (19, 1114516), (26, 814454), (38, 557258), (52, 407227), (76, 278629), (247, 85732), (494, 42866), (988, 21433)]