42989990

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{409}}^1\times {\mathrm{457}}^1$

素因数の和:896

約数の個数: 32

約数和(自身を含む): 81120960

約数和(自身を除く): 38130970

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 409, 457, 818, 914, 2045, 2285, 4090, 4570, 9407, 10511, 18814, 21022, 47035, 52555, 94070, 105110, 186913, 373826, 934565, 1869130, 4298999, 8597998, 21494995, 42989990]

約数ペア:

[(1, 42989990), (2, 21494995), (5, 8597998), (10, 4298999), (23, 1869130), (46, 934565), (115, 373826), (230, 186913), (409, 105110), (457, 94070), (818, 52555), (914, 47035), (2045, 21022), (2285, 18814), (4090, 10511), (4570, 9407)]