820238080

素因数分解:

$2^8\times 5^1\times {\mathrm{109}}^1\times {\mathrm{5879}}^1$

素因数の和:6009

約数の個数: 72

約数和(自身を含む): 1983088800

約数和(自身を除く): 1162850720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 109, 128, 160, 218, 256, 320, 436, 545, 640, 872, 1090, 1280, 1744, 2180, 3488, 4360, 5879, 6976, 8720, 11758, 13952, 17440, 23516, 27904, 29395, 34880, 47032, 58790, 69760, 94064, 117580, 139520, 188128, 235160, 376256, 470320, 640811, 752512, 940640, 1281622, 1505024, 1881280, 2563244, 3204055, 3762560, 5126488, 6408110, 7525120, 10252976, 12816220, 20505952, 25632440, 41011904, 51264880, 82023808, 102529760, 164047616, 205059520, 410119040, 820238080]

約数ペア:

[(1, 820238080), (2, 410119040), (4, 205059520), (5, 164047616), (8, 102529760), (10, 82023808), (16, 51264880), (20, 41011904), (32, 25632440), (40, 20505952), (64, 12816220), (80, 10252976), (109, 7525120), (128, 6408110), (160, 5126488), (218, 3762560), (256, 3204055), (320, 2563244), (436, 1881280), (545, 1505024), (640, 1281622), (872, 940640), (1090, 752512), (1280, 640811), (1744, 470320), (2180, 376256), (3488, 235160), (4360, 188128), (5879, 139520), (6976, 117580), (8720, 94064), (11758, 69760), (13952, 58790), (17440, 47032), (23516, 34880), (27904, 29395)]