164067880

素因数分解:

$2^3\times 5^1\times {\mathrm{643}}^1\times {\mathrm{6379}}^1$

素因数の和:7033

約数の個数: 32

約数和(自身を含む): 369784800

約数和(自身を除く): 205716920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 643, 1286, 2572, 3215, 5144, 6379, 6430, 12758, 12860, 25516, 25720, 31895, 51032, 63790, 127580, 255160, 4101697, 8203394, 16406788, 20508485, 32813576, 41016970, 82033940, 164067880]

約数ペア:

[(1, 164067880), (2, 82033940), (4, 41016970), (5, 32813576), (8, 20508485), (10, 16406788), (20, 8203394), (40, 4101697), (643, 255160), (1286, 127580), (2572, 63790), (3215, 51032), (5144, 31895), (6379, 25720), (6430, 25516), (12758, 12860)]