21392761

素因数分解:

${\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{509}}^1$

素因数の和:636

約数の個数: 16

約数和(自身を含む): 23904720

約数和(自身を除く): 2511959

約数列:

[1, 13, 53, 61, 509, 689, 793, 3233, 6617, 26977, 31049, 42029, 350701, 403637, 1645597, 21392761]

約数ペア:

[(1, 21392761), (13, 1645597), (53, 403637), (61, 350701), (509, 42029), (689, 31049), (793, 26977), (3233, 6617)]