18947271

素因数分解:

$3^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{2113}}^1$

素因数の和:2191

約数の個数: 24

約数和(自身を含む): 29883504

約数和(自身を除く): 10936233

約数列:

[1, 3, 7, 21, 49, 61, 147, 183, 427, 1281, 2113, 2989, 6339, 8967, 14791, 44373, 103537, 128893, 310611, 386679, 902251, 2706753, 6315757, 18947271]

約数ペア:

[(1, 18947271), (3, 6315757), (7, 2706753), (21, 902251), (49, 386679), (61, 310611), (147, 128893), (183, 103537), (427, 44373), (1281, 14791), (2113, 8967), (2989, 6339)]