81509820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{194071}}^1$

素因数の和:194090

約数の個数: 48

約数和(自身を含む): 260832768

約数和(自身を除く): 179322948

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, 194071, 388142, 582213, 776284, 970355, 1164426, 1358497, 1940710, 2328852, 2716994, 2911065, 3881420, 4075491, 5433988, 5822130, 6792485, 8150982, 11644260, 13584970, 16301964, 20377455, 27169940, 40754910, 81509820]

約数ペア:

[(1, 81509820), (2, 40754910), (3, 27169940), (4, 20377455), (5, 16301964), (6, 13584970), (7, 11644260), (10, 8150982), (12, 6792485), (14, 5822130), (15, 5433988), (20, 4075491), (21, 3881420), (28, 2911065), (30, 2716994), (35, 2328852), (42, 1940710), (60, 1358497), (70, 1164426), (84, 970355), (105, 776284), (140, 582213), (210, 388142), (420, 194071)]