21074968

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{241}}^1\times {\mathrm{643}}^1$

素因数の和:907

約数の個数: 32

約数和(自身を含む): 42078960

約数和(自身を除く): 21003992

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 241, 482, 643, 964, 1286, 1928, 2572, 4097, 5144, 8194, 10931, 16388, 21862, 32776, 43724, 87448, 154963, 309926, 619852, 1239704, 2634371, 5268742, 10537484, 21074968]

約数ペア:

[(1, 21074968), (2, 10537484), (4, 5268742), (8, 2634371), (17, 1239704), (34, 619852), (68, 309926), (136, 154963), (241, 87448), (482, 43724), (643, 32776), (964, 21862), (1286, 16388), (1928, 10931), (2572, 8194), (4097, 5144)]