21799745

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{907}}^1$

素因数の和:965

約数の個数: 32

約数和(自身を含む): 31380480

約数和(自身を除く): 9580735

約数列:

[1, 5, 11, 19, 23, 55, 95, 115, 209, 253, 437, 907, 1045, 1265, 2185, 4535, 4807, 9977, 17233, 20861, 24035, 49885, 86165, 104305, 189563, 229471, 396359, 947815, 1147355, 1981795, 4359949, 21799745]

約数ペア:

[(1, 21799745), (5, 4359949), (11, 1981795), (19, 1147355), (23, 947815), (55, 396359), (95, 229471), (115, 189563), (209, 104305), (253, 86165), (437, 49885), (907, 24035), (1045, 20861), (1265, 17233), (2185, 9977), (4535, 4807)]