18819964

素因数分解:

$2^2\times {\mathrm{61}}^1\times {\mathrm{137}}^1\times {\mathrm{563}}^1$

素因数の和:765

約数の個数: 24

約数和(自身を含む): 33779088

約数和(自身を除く): 14959124

約数列:

[1, 2, 4, 61, 122, 137, 244, 274, 548, 563, 1126, 2252, 8357, 16714, 33428, 34343, 68686, 77131, 137372, 154262, 308524, 4704991, 9409982, 18819964]

約数ペア:

[(1, 18819964), (2, 9409982), (4, 4704991), (61, 308524), (122, 154262), (137, 137372), (244, 77131), (274, 68686), (548, 34343), (563, 33428), (1126, 16714), (2252, 8357)]