19715840

素因数分解:

$2^8\times 5^1\times {\mathrm{73}}^1\times {\mathrm{211}}^1$

素因数の和:305

約数の個数: 72

約数和(自身を含む): 48099408

約数和(自身を除く): 28383568

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 73, 80, 128, 146, 160, 211, 256, 292, 320, 365, 422, 584, 640, 730, 844, 1055, 1168, 1280, 1460, 1688, 2110, 2336, 2920, 3376, 4220, 4672, 5840, 6752, 8440, 9344, 11680, 13504, 15403, 16880, 18688, 23360, 27008, 30806, 33760, 46720, 54016, 61612, 67520, 77015, 93440, 123224, 135040, 154030, 246448, 270080, 308060, 492896, 616120, 985792, 1232240, 1971584, 2464480, 3943168, 4928960, 9857920, 19715840]

約数ペア:

[(1, 19715840), (2, 9857920), (4, 4928960), (5, 3943168), (8, 2464480), (10, 1971584), (16, 1232240), (20, 985792), (32, 616120), (40, 492896), (64, 308060), (73, 270080), (80, 246448), (128, 154030), (146, 135040), (160, 123224), (211, 93440), (256, 77015), (292, 67520), (320, 61612), (365, 54016), (422, 46720), (584, 33760), (640, 30806), (730, 27008), (844, 23360), (1055, 18688), (1168, 16880), (1280, 15403), (1460, 13504), (1688, 11680), (2110, 9344), (2336, 8440), (2920, 6752), (3376, 5840), (4220, 4672)]