21055037.000000000

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{1359307}}^1$

素因数の和:1359321

約数の個数: 32

約数和(自身を含む): 489350880

約数和(自身を除く): 326234040

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 1359307, 2718614, 4077921, 5437228, 6796535, 8155842, 10874456, 13593070, 16311684, 20389605, 27186140, 32623368, 40779210, 54372280, 81558420, 163116840]

約数ペア:

[(1, 163116840), (2, 81558420), (3, 54372280), (4, 40779210), (5, 32623368), (6, 27186140), (8, 20389605), (10, 16311684), (12, 13593070), (15, 10874456), (20, 8155842), (24, 6796535), (30, 5437228), (40, 4077921), (60, 2718614), (120, 1359307)]