20734520

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{269}}^1$

素因数の和:368

約数の個数: 64

約数和(自身を含む): 48988800

約数和(自身を除く): 28254280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 47, 82, 94, 164, 188, 205, 235, 269, 328, 376, 410, 470, 538, 820, 940, 1076, 1345, 1640, 1880, 1927, 2152, 2690, 3854, 5380, 7708, 9635, 10760, 11029, 12643, 15416, 19270, 22058, 25286, 38540, 44116, 50572, 55145, 63215, 77080, 88232, 101144, 110290, 126430, 220580, 252860, 441160, 505720, 518363, 1036726, 2073452, 2591815, 4146904, 5183630, 10367260, 20734520]

約数ペア:

[(1, 20734520), (2, 10367260), (4, 5183630), (5, 4146904), (8, 2591815), (10, 2073452), (20, 1036726), (40, 518363), (41, 505720), (47, 441160), (82, 252860), (94, 220580), (164, 126430), (188, 110290), (205, 101144), (235, 88232), (269, 77080), (328, 63215), (376, 55145), (410, 50572), (470, 44116), (538, 38540), (820, 25286), (940, 22058), (1076, 19270), (1345, 15416), (1640, 12643), (1880, 11029), (1927, 10760), (2152, 9635), (2690, 7708), (3854, 5380)]