21496839

素因数分解:

$3^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{1607}}^1$

素因数の和:1644

約数の個数: 32

約数和(自身を含む): 36019200

約数和(自身を除く): 14522361

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 273, 343, 637, 1029, 1607, 1911, 4459, 4821, 11249, 13377, 20891, 33747, 62673, 78743, 146237, 236229, 438711, 551201, 1023659, 1653603, 3070977, 7165613, 21496839]

約数ペア:

[(1, 21496839), (3, 7165613), (7, 3070977), (13, 1653603), (21, 1023659), (39, 551201), (49, 438711), (91, 236229), (147, 146237), (273, 78743), (343, 62673), (637, 33747), (1029, 20891), (1607, 13377), (1911, 11249), (4459, 4821)]