21273670

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:201

約数の個数: 64

約数和(自身を含む): 44089920

約数和(自身を除く): 22816250

約数列:

[1, 2, 5, 10, 11, 22, 41, 53, 55, 82, 89, 106, 110, 178, 205, 265, 410, 445, 451, 530, 583, 890, 902, 979, 1166, 1958, 2173, 2255, 2915, 3649, 4346, 4510, 4717, 4895, 5830, 7298, 9434, 9790, 10865, 18245, 21730, 23585, 23903, 36490, 40139, 47170, 47806, 51887, 80278, 103774, 119515, 193397, 200695, 239030, 259435, 386794, 401390, 518870, 966985, 1933970, 2127367, 4254734, 10636835, 21273670]

約数ペア:

[(1, 21273670), (2, 10636835), (5, 4254734), (10, 2127367), (11, 1933970), (22, 966985), (41, 518870), (53, 401390), (55, 386794), (82, 259435), (89, 239030), (106, 200695), (110, 193397), (178, 119515), (205, 103774), (265, 80278), (410, 51887), (445, 47806), (451, 47170), (530, 40139), (583, 36490), (890, 23903), (902, 23585), (979, 21730), (1166, 18245), (1958, 10865), (2173, 9790), (2255, 9434), (2915, 7298), (3649, 5830), (4346, 4895), (4510, 4717)]