16677980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^2$

素因数の和:147

約数の個数: 72

約数和(自身を含む): 40071024

約数和(自身を除く): 23393044

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 43, 44, 55, 82, 86, 110, 164, 172, 205, 215, 220, 410, 430, 451, 473, 820, 860, 902, 946, 1763, 1804, 1849, 1892, 2255, 2365, 3526, 3698, 4510, 4730, 7052, 7396, 8815, 9020, 9245, 9460, 17630, 18490, 19393, 20339, 35260, 36980, 38786, 40678, 75809, 77572, 81356, 96965, 101695, 151618, 193930, 203390, 303236, 379045, 387860, 406780, 758090, 833899, 1516180, 1667798, 3335596, 4169495, 8338990, 16677980]

約数ペア:

[(1, 16677980), (2, 8338990), (4, 4169495), (5, 3335596), (10, 1667798), (11, 1516180), (20, 833899), (22, 758090), (41, 406780), (43, 387860), (44, 379045), (55, 303236), (82, 203390), (86, 193930), (110, 151618), (164, 101695), (172, 96965), (205, 81356), (215, 77572), (220, 75809), (410, 40678), (430, 38786), (451, 36980), (473, 35260), (820, 20339), (860, 19393), (902, 18490), (946, 17630), (1763, 9460), (1804, 9245), (1849, 9020), (1892, 8815), (2255, 7396), (2365, 7052), (3526, 4730), (3698, 4510)]