21495747

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1109}}^1$

素因数の和:1203

約数の個数: 32

約数和(自身を含む): 35804160

約数和(自身を除く): 14308413

約数列:

[1, 3, 7, 13, 21, 39, 71, 91, 213, 273, 497, 923, 1109, 1491, 2769, 3327, 6461, 7763, 14417, 19383, 23289, 43251, 78739, 100919, 236217, 302757, 551173, 1023607, 1653519, 3070821, 7165249, 21495747]

約数ペア:

[(1, 21495747), (3, 7165249), (7, 3070821), (13, 1653519), (21, 1023607), (39, 551173), (71, 302757), (91, 236217), (213, 100919), (273, 78739), (497, 43251), (923, 23289), (1109, 19383), (1491, 14417), (2769, 7763), (3327, 6461)]