21519472

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{337}}^1$

素因数の和:665

約数の個数: 40

約数和(自身を含む): 45181136

約数和(自身を除く): 23661664

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 307, 337, 614, 674, 1228, 1348, 2456, 2696, 3991, 4381, 4912, 5392, 7982, 8762, 15964, 17524, 31928, 35048, 63856, 70096, 103459, 206918, 413836, 827672, 1344967, 1655344, 2689934, 5379868, 10759736, 21519472]

約数ペア:

[(1, 21519472), (2, 10759736), (4, 5379868), (8, 2689934), (13, 1655344), (16, 1344967), (26, 827672), (52, 413836), (104, 206918), (208, 103459), (307, 70096), (337, 63856), (614, 35048), (674, 31928), (1228, 17524), (1348, 15964), (2456, 8762), (2696, 7982), (3991, 5392), (4381, 4912)]