21212373

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:218

約数の個数: 48

約数和(自身を含む): 36072960

約数和(自身を除く): 14860587

約数列:

[1, 3, 7, 13, 21, 39, 43, 91, 129, 139, 169, 273, 301, 417, 507, 559, 903, 973, 1183, 1677, 1807, 2919, 3549, 3913, 5421, 5977, 7267, 11739, 12649, 17931, 21801, 23491, 37947, 41839, 50869, 70473, 77701, 125517, 152607, 164437, 233103, 493311, 543907, 1010113, 1631721, 3030339, 7070791, 21212373]

約数ペア:

[(1, 21212373), (3, 7070791), (7, 3030339), (13, 1631721), (21, 1010113), (39, 543907), (43, 493311), (91, 233103), (129, 164437), (139, 152607), (169, 125517), (273, 77701), (301, 70473), (417, 50869), (507, 41839), (559, 37947), (903, 23491), (973, 21801), (1183, 17931), (1677, 12649), (1807, 11739), (2919, 7267), (3549, 5977), (3913, 5421)]