21878241

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{1787}}^1$

素因数の和:1861

約数の個数: 32

約数和(自身を含む): 37075968

約数和(自身を除く): 15197727

約数列:

[1, 3, 7, 11, 21, 33, 53, 77, 159, 231, 371, 583, 1113, 1749, 1787, 4081, 5361, 12243, 12509, 19657, 37527, 58971, 94711, 137599, 284133, 412797, 662977, 1041821, 1988931, 3125463, 7292747, 21878241]

約数ペア:

[(1, 21878241), (3, 7292747), (7, 3125463), (11, 1988931), (21, 1041821), (33, 662977), (53, 412797), (77, 284133), (159, 137599), (231, 94711), (371, 58971), (583, 37527), (1113, 19657), (1749, 12509), (1787, 12243), (4081, 5361)]