18066980

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{251}}^1$

素因数の和:380

約数の個数: 48

約数和(自身を含む): 39372480

約数和(自身を除く): 21305500

約数列:

[1, 2, 4, 5, 10, 20, 59, 61, 118, 122, 236, 244, 251, 295, 305, 502, 590, 610, 1004, 1180, 1220, 1255, 2510, 3599, 5020, 7198, 14396, 14809, 15311, 17995, 29618, 30622, 35990, 59236, 61244, 71980, 74045, 76555, 148090, 153110, 296180, 306220, 903349, 1806698, 3613396, 4516745, 9033490, 18066980]

約数ペア:

[(1, 18066980), (2, 9033490), (4, 4516745), (5, 3613396), (10, 1806698), (20, 903349), (59, 306220), (61, 296180), (118, 153110), (122, 148090), (236, 76555), (244, 74045), (251, 71980), (295, 61244), (305, 59236), (502, 35990), (590, 30622), (610, 29618), (1004, 17995), (1180, 15311), (1220, 14809), (1255, 14396), (2510, 7198), (3599, 5020)]