21053929

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{587}}^1$

素因数の和:720

約数の個数: 16

約数和(自身を含む): 23708160

約数和(自身を除く): 2654231

約数列:

[1, 13, 31, 89, 403, 587, 1157, 2759, 7631, 18197, 35867, 52243, 236561, 679159, 1619533, 21053929]

約数ペア:

[(1, 21053929), (13, 1619533), (31, 679159), (89, 236561), (403, 52243), (587, 35867), (1157, 18197), (2759, 7631)]