653440

素因数分解:

$2^7\times 5^1\times {\mathrm{1021}}^1$

素因数の和:1040

約数の個数: 32

約数和(自身を含む): 1563660

約数和(自身を除く): 910220

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 1021, 2042, 4084, 5105, 8168, 10210, 16336, 20420, 32672, 40840, 65344, 81680, 130688, 163360, 326720, 653440]

約数ペア:

[(1, 653440), (2, 326720), (4, 163360), (5, 130688), (8, 81680), (10, 65344), (16, 40840), (20, 32672), (32, 20420), (40, 16336), (64, 10210), (80, 8168), (128, 5105), (160, 4084), (320, 2042), (640, 1021)]