18491921

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{257}}^1\times {\mathrm{541}}^1$

素因数の和:824

約数の個数: 16

約数和(自身を含む): 22373760

約数和(自身を除く): 3881839

約数列:

[1, 7, 19, 133, 257, 541, 1799, 3787, 4883, 10279, 34181, 71953, 139037, 973259, 2641703, 18491921]

約数ペア:

[(1, 18491921), (7, 2641703), (19, 973259), (133, 139037), (257, 71953), (541, 34181), (1799, 10279), (3787, 4883)]