287920

素因数分解:

$2^4\times 5^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1$

素因数の和:133

約数の個数: 40

約数和(自身を含む): 691920

約数和(自身を除く): 404000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 59, 61, 80, 118, 122, 236, 244, 295, 305, 472, 488, 590, 610, 944, 976, 1180, 1220, 2360, 2440, 3599, 4720, 4880, 7198, 14396, 17995, 28792, 35990, 57584, 71980, 143960, 287920]

約数ペア:

[(1, 287920), (2, 143960), (4, 71980), (5, 57584), (8, 35990), (10, 28792), (16, 17995), (20, 14396), (40, 7198), (59, 4880), (61, 4720), (80, 3599), (118, 2440), (122, 2360), (236, 1220), (244, 1180), (295, 976), (305, 944), (472, 610), (488, 590)]