1680

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1$

素因数の和:23

約数の個数: 40

約数和(自身を含む): 5952

約数和(自身を除く): 4272

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680]

約数ペア:

[(1, 1680), (2, 840), (3, 560), (4, 420), (5, 336), (6, 280), (7, 240), (8, 210), (10, 168), (12, 140), (14, 120), (15, 112), (16, 105), (20, 84), (21, 80), (24, 70), (28, 60), (30, 56), (35, 48), (40, 42)]