81857580

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{194899}}^1$

素因数の和:194918

約数の個数: 48

約数和(自身を含む): 261945600

約数和(自身を除く): 180088020

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, 194899, 389798, 584697, 779596, 974495, 1169394, 1364293, 1948990, 2338788, 2728586, 2923485, 3897980, 4092879, 5457172, 5846970, 6821465, 8185758, 11693940, 13642930, 16371516, 20464395, 27285860, 40928790, 81857580]

約数ペア:

[(1, 81857580), (2, 40928790), (3, 27285860), (4, 20464395), (5, 16371516), (6, 13642930), (7, 11693940), (10, 8185758), (12, 6821465), (14, 5846970), (15, 5457172), (20, 4092879), (21, 3897980), (28, 2923485), (30, 2728586), (35, 2338788), (42, 1948990), (60, 1364293), (70, 1169394), (84, 974495), (105, 779596), (140, 584697), (210, 389798), (420, 194899)]