81402560

素因数分解:

$2^6\times 5^1\times {\mathrm{254383}}^1$

素因数の和:254400

約数の個数: 28

約数和(自身を含む): 193840608

約数和(自身を除く): 112438048

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 254383, 508766, 1017532, 1271915, 2035064, 2543830, 4070128, 5087660, 8140256, 10175320, 16280512, 20350640, 40701280, 81402560]

約数ペア:

[(1, 81402560), (2, 40701280), (4, 20350640), (5, 16280512), (8, 10175320), (10, 8140256), (16, 5087660), (20, 4070128), (32, 2543830), (40, 2035064), (64, 1271915), (80, 1017532), (160, 508766), (320, 254383)]