16919980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{10987}}^1$

素因数の和:11014

約数の個数: 48

約数和(自身を含む): 44303616

約数和(自身を除く): 27383636

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 10987, 21974, 43948, 54935, 76909, 109870, 120857, 153818, 219740, 241714, 307636, 384545, 483428, 604285, 769090, 845999, 1208570, 1538180, 1691998, 2417140, 3383996, 4229995, 8459990, 16919980]

約数ペア:

[(1, 16919980), (2, 8459990), (4, 4229995), (5, 3383996), (7, 2417140), (10, 1691998), (11, 1538180), (14, 1208570), (20, 845999), (22, 769090), (28, 604285), (35, 483428), (44, 384545), (55, 307636), (70, 241714), (77, 219740), (110, 153818), (140, 120857), (154, 109870), (220, 76909), (308, 54935), (385, 43948), (770, 21974), (1540, 10987)]