21602900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{479}}^1$

素因数の和:545

約数の個数: 72

約数和(自身を含む): 52496640

約数和(自身を除く): 30893740

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 41, 44, 50, 55, 82, 100, 110, 164, 205, 220, 275, 410, 451, 479, 550, 820, 902, 958, 1025, 1100, 1804, 1916, 2050, 2255, 2395, 4100, 4510, 4790, 5269, 9020, 9580, 10538, 11275, 11975, 19639, 21076, 22550, 23950, 26345, 39278, 45100, 47900, 52690, 78556, 98195, 105380, 131725, 196390, 216029, 263450, 392780, 432058, 490975, 526900, 864116, 981950, 1080145, 1963900, 2160290, 4320580, 5400725, 10801450, 21602900]

約数ペア:

[(1, 21602900), (2, 10801450), (4, 5400725), (5, 4320580), (10, 2160290), (11, 1963900), (20, 1080145), (22, 981950), (25, 864116), (41, 526900), (44, 490975), (50, 432058), (55, 392780), (82, 263450), (100, 216029), (110, 196390), (164, 131725), (205, 105380), (220, 98195), (275, 78556), (410, 52690), (451, 47900), (479, 45100), (550, 39278), (820, 26345), (902, 23950), (958, 22550), (1025, 21076), (1100, 19639), (1804, 11975), (1916, 11275), (2050, 10538), (2255, 9580), (2395, 9020), (4100, 5269), (4510, 4790)]