21090425

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{853}}^1$

素因数の和:929

約数の個数: 24

約数和(自身を含む): 27956544

約数和(自身を除く): 6866119

約数列:

[1, 5, 23, 25, 43, 115, 215, 575, 853, 989, 1075, 4265, 4945, 19619, 21325, 24725, 36679, 98095, 183395, 490475, 843617, 916975, 4218085, 21090425]

約数ペア:

[(1, 21090425), (5, 4218085), (23, 916975), (25, 843617), (43, 490475), (115, 183395), (215, 98095), (575, 36679), (853, 24725), (989, 21325), (1075, 19619), (4265, 4945)]