19770880

素因数分解:

$2^9\times 5^1\times {\mathrm{7723}}^1$

素因数の和:7746

約数の個数: 40

約数和(自身を含む): 47409912

約数和(自身を除く): 27639032

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 7723, 15446, 30892, 38615, 61784, 77230, 123568, 154460, 247136, 308920, 494272, 617840, 988544, 1235680, 1977088, 2471360, 3954176, 4942720, 9885440, 19770880]

約数ペア:

[(1, 19770880), (2, 9885440), (4, 4942720), (5, 3954176), (8, 2471360), (10, 1977088), (16, 1235680), (20, 988544), (32, 617840), (40, 494272), (64, 308920), (80, 247136), (128, 154460), (160, 123568), (256, 77230), (320, 61784), (512, 38615), (640, 30892), (1280, 15446), (2560, 7723)]