19798988

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{2153}}^1$

素因数の和:2198

約数の個数: 36

約数和(自身を含む): 40107480

約数和(自身を除く): 20308492

約数列:

[1, 2, 4, 11, 19, 22, 38, 44, 76, 121, 209, 242, 418, 484, 836, 2153, 2299, 4306, 4598, 8612, 9196, 23683, 40907, 47366, 81814, 94732, 163628, 260513, 449977, 521026, 899954, 1042052, 1799908, 4949747, 9899494, 19798988]

約数ペア:

[(1, 19798988), (2, 9899494), (4, 4949747), (11, 1799908), (19, 1042052), (22, 899954), (38, 521026), (44, 449977), (76, 260513), (121, 163628), (209, 94732), (242, 81814), (418, 47366), (484, 40907), (836, 23683), (2153, 9196), (2299, 8612), (4306, 4598)]