20211880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{827}}^1$

素因数の和:898

約数の個数: 64

約数和(自身を含む): 50077440

約数和(自身を除く): 29865560

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 47, 52, 65, 94, 104, 130, 188, 235, 260, 376, 470, 520, 611, 827, 940, 1222, 1654, 1880, 2444, 3055, 3308, 4135, 4888, 6110, 6616, 8270, 10751, 12220, 16540, 21502, 24440, 33080, 38869, 43004, 53755, 77738, 86008, 107510, 155476, 194345, 215020, 310952, 388690, 430040, 505297, 777380, 1010594, 1554760, 2021188, 2526485, 4042376, 5052970, 10105940, 20211880]

約数ペア:

[(1, 20211880), (2, 10105940), (4, 5052970), (5, 4042376), (8, 2526485), (10, 2021188), (13, 1554760), (20, 1010594), (26, 777380), (40, 505297), (47, 430040), (52, 388690), (65, 310952), (94, 215020), (104, 194345), (130, 155476), (188, 107510), (235, 86008), (260, 77738), (376, 53755), (470, 43004), (520, 38869), (611, 33080), (827, 24440), (940, 21502), (1222, 16540), (1654, 12220), (1880, 10751), (2444, 8270), (3055, 6616), (3308, 6110), (4135, 4888)]