81256980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{193469}}^1$

素因数の和:193488

約数の個数: 48

約数和(自身を含む): 260023680

約数和(自身を除く): 178766700

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, 193469, 386938, 580407, 773876, 967345, 1160814, 1354283, 1934690, 2321628, 2708566, 2902035, 3869380, 4062849, 5417132, 5804070, 6771415, 8125698, 11608140, 13542830, 16251396, 20314245, 27085660, 40628490, 81256980]

約数ペア:

[(1, 81256980), (2, 40628490), (3, 27085660), (4, 20314245), (5, 16251396), (6, 13542830), (7, 11608140), (10, 8125698), (12, 6771415), (14, 5804070), (15, 5417132), (20, 4062849), (21, 3869380), (28, 2902035), (30, 2708566), (35, 2321628), (42, 1934690), (60, 1354283), (70, 1160814), (84, 967345), (105, 773876), (140, 580407), (210, 386938), (420, 193469)]