640027760

素因数分解:

$2^4\times 5^1\times {\mathrm{2029}}^1\times {\mathrm{3943}}^1$

素因数の和:5985

約数の個数: 40

約数和(自身を含む): 1489175520

約数和(自身を除く): 849147760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2029, 3943, 4058, 7886, 8116, 10145, 15772, 16232, 19715, 20290, 31544, 32464, 39430, 40580, 63088, 78860, 81160, 157720, 162320, 315440, 8000347, 16000694, 32001388, 40001735, 64002776, 80003470, 128005552, 160006940, 320013880, 640027760]

約数ペア:

[(1, 640027760), (2, 320013880), (4, 160006940), (5, 128005552), (8, 80003470), (10, 64002776), (16, 40001735), (20, 32001388), (40, 16000694), (80, 8000347), (2029, 315440), (3943, 162320), (4058, 157720), (7886, 81160), (8116, 78860), (10145, 63088), (15772, 40580), (16232, 39430), (19715, 32464), (20290, 31544)]