261559040

素因数分解:

$2^8\times 5^1\times {\mathrm{127}}^1\times {\mathrm{1609}}^1$

素因数の和:1757

約数の個数: 72

約数和(自身を含む): 631841280

約数和(自身を除く): 370282240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 128, 160, 254, 256, 320, 508, 635, 640, 1016, 1270, 1280, 1609, 2032, 2540, 3218, 4064, 5080, 6436, 8045, 8128, 10160, 12872, 16090, 16256, 20320, 25744, 32180, 32512, 40640, 51488, 64360, 81280, 102976, 128720, 162560, 204343, 205952, 257440, 408686, 411904, 514880, 817372, 1021715, 1029760, 1634744, 2043430, 2059520, 3269488, 4086860, 6538976, 8173720, 13077952, 16347440, 26155904, 32694880, 52311808, 65389760, 130779520, 261559040]

約数ペア:

[(1, 261559040), (2, 130779520), (4, 65389760), (5, 52311808), (8, 32694880), (10, 26155904), (16, 16347440), (20, 13077952), (32, 8173720), (40, 6538976), (64, 4086860), (80, 3269488), (127, 2059520), (128, 2043430), (160, 1634744), (254, 1029760), (256, 1021715), (320, 817372), (508, 514880), (635, 411904), (640, 408686), (1016, 257440), (1270, 205952), (1280, 204343), (1609, 162560), (2032, 128720), (2540, 102976), (3218, 81280), (4064, 64360), (5080, 51488), (6436, 40640), (8045, 32512), (8128, 32180), (10160, 25744), (12872, 20320), (16090, 16256)]