19639808

素因数分解:

$2^9\times {\mathrm{89}}^1\times {\mathrm{431}}^1$

素因数の和:538

約数の個数: 40

約数和(自身を含む): 39774240

約数和(自身を除く): 20134432

約数列:

[1, 2, 4, 8, 16, 32, 64, 89, 128, 178, 256, 356, 431, 512, 712, 862, 1424, 1724, 2848, 3448, 5696, 6896, 11392, 13792, 22784, 27584, 38359, 45568, 55168, 76718, 110336, 153436, 220672, 306872, 613744, 1227488, 2454976, 4909952, 9819904, 19639808]

約数ペア:

[(1, 19639808), (2, 9819904), (4, 4909952), (8, 2454976), (16, 1227488), (32, 613744), (64, 306872), (89, 220672), (128, 153436), (178, 110336), (256, 76718), (356, 55168), (431, 45568), (512, 38359), (712, 27584), (862, 22784), (1424, 13792), (1724, 11392), (2848, 6896), (3448, 5696)]