20198991040

素因数分解:

$2^6\times 5^1\times {\mathrm{383}}^1\times {\mathrm{164809}}^1$

素因数の和:165209

約数の個数: 56

約数和(自身を含む): 48224724480

約数和(自身を除く): 28025733440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 383, 766, 1532, 1915, 3064, 3830, 6128, 7660, 12256, 15320, 24512, 30640, 61280, 122560, 164809, 329618, 659236, 824045, 1318472, 1648090, 2636944, 3296180, 5273888, 6592360, 10547776, 13184720, 26369440, 52738880, 63121847, 126243694, 252487388, 315609235, 504974776, 631218470, 1009949552, 1262436940, 2019899104, 2524873880, 4039798208, 5049747760, 10099495520, 20198991040]

約数ペア:

[(1, 20198991040), (2, 10099495520), (4, 5049747760), (5, 4039798208), (8, 2524873880), (10, 2019899104), (16, 1262436940), (20, 1009949552), (32, 631218470), (40, 504974776), (64, 315609235), (80, 252487388), (160, 126243694), (320, 63121847), (383, 52738880), (766, 26369440), (1532, 13184720), (1915, 10547776), (3064, 6592360), (3830, 5273888), (6128, 3296180), (7660, 2636944), (12256, 1648090), (15320, 1318472), (24512, 824045), (30640, 659236), (61280, 329618), (122560, 164809)]