249179970

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{638923}}^1$

素因数の和:638946

約数の個数: 32

約数和(自身を含む): 644035392

約数和(自身を除く): 394855422

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 638923, 1277846, 1916769, 3194615, 3833538, 6389230, 8305999, 9583845, 16611998, 19167690, 24917997, 41529995, 49835994, 83059990, 124589985, 249179970]

約数ペア:

[(1, 249179970), (2, 124589985), (3, 83059990), (5, 49835994), (6, 41529995), (10, 24917997), (13, 19167690), (15, 16611998), (26, 9583845), (30, 8305999), (39, 6389230), (65, 3833538), (78, 3194615), (130, 1916769), (195, 1277846), (390, 638923)]