20987692

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{103}}^1\times {\mathrm{421}}^1$

素因数の和:550

約数の個数: 36

約数和(自身を含む): 40859728

約数和(自身を除く): 19872036

約数列:

[1, 2, 4, 11, 22, 44, 103, 121, 206, 242, 412, 421, 484, 842, 1133, 1684, 2266, 4532, 4631, 9262, 12463, 18524, 24926, 43363, 49852, 50941, 86726, 101882, 173452, 203764, 476993, 953986, 1907972, 5246923, 10493846, 20987692]

約数ペア:

[(1, 20987692), (2, 10493846), (4, 5246923), (11, 1907972), (22, 953986), (44, 476993), (103, 203764), (121, 173452), (206, 101882), (242, 86726), (412, 50941), (421, 49852), (484, 43363), (842, 24926), (1133, 18524), (1684, 12463), (2266, 9262), (4532, 4631)]