867291940

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^2\times {\mathrm{47}}^1\times {\mathrm{499}}^1$

素因数の和:641

約数の個数: 72

約数和(自身を含む): 1908144000

約数和(自身を除く): 1040852060

約数列:

[1, 2, 4, 5, 10, 20, 43, 47, 86, 94, 172, 188, 215, 235, 430, 470, 499, 860, 940, 998, 1849, 1996, 2021, 2495, 3698, 4042, 4990, 7396, 8084, 9245, 9980, 10105, 18490, 20210, 21457, 23453, 36980, 40420, 42914, 46906, 85828, 86903, 93812, 107285, 117265, 173806, 214570, 234530, 347612, 429140, 434515, 469060, 869030, 922651, 1008479, 1738060, 1845302, 2016958, 3690604, 4033916, 4613255, 5042395, 9226510, 10084790, 18453020, 20169580, 43364597, 86729194, 173458388, 216822985, 433645970, 867291940]

約数ペア:

[(1, 867291940), (2, 433645970), (4, 216822985), (5, 173458388), (10, 86729194), (20, 43364597), (43, 20169580), (47, 18453020), (86, 10084790), (94, 9226510), (172, 5042395), (188, 4613255), (215, 4033916), (235, 3690604), (430, 2016958), (470, 1845302), (499, 1738060), (860, 1008479), (940, 922651), (998, 869030), (1849, 469060), (1996, 434515), (2021, 429140), (2495, 347612), (3698, 234530), (4042, 214570), (4990, 173806), (7396, 117265), (8084, 107285), (9245, 93812), (9980, 86903), (10105, 85828), (18490, 46906), (20210, 42914), (21457, 40420), (23453, 36980)]