21596820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51421}}^1$

素因数の和:51440

約数の個数: 48

約数和(自身を含む): 69111168

約数和(自身を除く): 47514348

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51421, 102842, 154263, 205684, 257105, 308526, 359947, 514210, 617052, 719894, 771315, 1028420, 1079841, 1439788, 1542630, 1799735, 2159682, 3085260, 3599470, 4319364, 5399205, 7198940, 10798410, 21596820]

約数ペア:

[(1, 21596820), (2, 10798410), (3, 7198940), (4, 5399205), (5, 4319364), (6, 3599470), (7, 3085260), (10, 2159682), (12, 1799735), (14, 1542630), (15, 1439788), (20, 1079841), (21, 1028420), (28, 771315), (30, 719894), (35, 617052), (42, 514210), (60, 359947), (70, 308526), (84, 257105), (105, 205684), (140, 154263), (210, 102842), (420, 51421)]