21015970

素因数分解:

$2^1\times 5^1\times {\mathrm{73}}^1\times {\mathrm{28789}}^1$

素因数の和:28869

約数の個数: 16

約数和(自身を含む): 38348280

約数和(自身を除く): 17332310

約数列:

[1, 2, 5, 10, 73, 146, 365, 730, 28789, 57578, 143945, 287890, 2101597, 4203194, 10507985, 21015970]

約数ペア:

[(1, 21015970), (2, 10507985), (5, 4203194), (10, 2101597), (73, 287890), (146, 143945), (365, 57578), (730, 28789)]