20641168

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{101}}^1\times {\mathrm{241}}^1$

素因数の和:403

約数の個数: 40

約数和(自身を含む): 41321016

約数和(自身を除く): 20679848

約数列:

[1, 2, 4, 8, 16, 53, 101, 106, 202, 212, 241, 404, 424, 482, 808, 848, 964, 1616, 1928, 3856, 5353, 10706, 12773, 21412, 24341, 25546, 42824, 48682, 51092, 85648, 97364, 102184, 194728, 204368, 389456, 1290073, 2580146, 5160292, 10320584, 20641168]

約数ペア:

[(1, 20641168), (2, 10320584), (4, 5160292), (8, 2580146), (16, 1290073), (53, 389456), (101, 204368), (106, 194728), (202, 102184), (212, 97364), (241, 85648), (404, 51092), (424, 48682), (482, 42824), (808, 25546), (848, 24341), (964, 21412), (1616, 12773), (1928, 10706), (3856, 5353)]