21316175

素因数分解:

$5^2\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{251}}^1$

素因数の和:383

約数の個数: 24

約数和(自身を含む): 27498240

約数和(自身を除く): 6182065

約数列:

[1, 5, 25, 43, 79, 215, 251, 395, 1075, 1255, 1975, 3397, 6275, 10793, 16985, 19829, 53965, 84925, 99145, 269825, 495725, 852647, 4263235, 21316175]

約数ペア:

[(1, 21316175), (5, 4263235), (25, 852647), (43, 495725), (79, 269825), (215, 99145), (251, 84925), (395, 53965), (1075, 19829), (1255, 16985), (1975, 10793), (3397, 6275)]