21371988

素因数分解:

$2^2\times 3^1\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{359}}^1$

素因数の和:429

約数の個数: 72

約数和(自身を含む): 56306880

約数和(自身を除く): 34934892

約数列:

[1, 2, 3, 4, 6, 11, 12, 22, 33, 41, 44, 66, 82, 121, 123, 132, 164, 242, 246, 359, 363, 451, 484, 492, 718, 726, 902, 1077, 1353, 1436, 1452, 1804, 2154, 2706, 3949, 4308, 4961, 5412, 7898, 9922, 11847, 14719, 14883, 15796, 19844, 23694, 29438, 29766, 43439, 44157, 47388, 58876, 59532, 86878, 88314, 130317, 161909, 173756, 176628, 260634, 323818, 485727, 521268, 647636, 971454, 1780999, 1942908, 3561998, 5342997, 7123996, 10685994, 21371988]

約数ペア:

[(1, 21371988), (2, 10685994), (3, 7123996), (4, 5342997), (6, 3561998), (11, 1942908), (12, 1780999), (22, 971454), (33, 647636), (41, 521268), (44, 485727), (66, 323818), (82, 260634), (121, 176628), (123, 173756), (132, 161909), (164, 130317), (242, 88314), (246, 86878), (359, 59532), (363, 58876), (451, 47388), (484, 44157), (492, 43439), (718, 29766), (726, 29438), (902, 23694), (1077, 19844), (1353, 15796), (1436, 14883), (1452, 14719), (1804, 11847), (2154, 9922), (2706, 7898), (3949, 5412), (4308, 4961)]