7980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1$

素因数の和:38

約数の個数: 48

約数和(自身を含む): 26880

約数和(自身を除く): 18900

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 19, 20, 21, 28, 30, 35, 38, 42, 57, 60, 70, 76, 84, 95, 105, 114, 133, 140, 190, 210, 228, 266, 285, 380, 399, 420, 532, 570, 665, 798, 1140, 1330, 1596, 1995, 2660, 3990, 7980]

約数ペア:

[(1, 7980), (2, 3990), (3, 2660), (4, 1995), (5, 1596), (6, 1330), (7, 1140), (10, 798), (12, 665), (14, 570), (15, 532), (19, 420), (20, 399), (21, 380), (28, 285), (30, 266), (35, 228), (38, 210), (42, 190), (57, 140), (60, 133), (70, 114), (76, 105), (84, 95)]