21781253

素因数分解:

${\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{751}}^1$

素因数の和:884

約数の個数: 16

約数和(自身を含む): 24761856

約数和(自身を除く): 2980603

約数列:

[1, 13, 23, 97, 299, 751, 1261, 2231, 9763, 17273, 29003, 72847, 224549, 947011, 1675481, 21781253]

約数ペア:

[(1, 21781253), (13, 1675481), (23, 947011), (97, 224549), (299, 72847), (751, 29003), (1261, 17273), (2231, 9763)]