420355840

素因数分解:

$2^8\times 5^1\times {\mathrm{79}}^1\times {\mathrm{4157}}^1$

素因数の和:4257

約数の個数: 72

約数和(自身を含む): 1019874240

約数和(自身を除く): 599518400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 128, 158, 160, 256, 316, 320, 395, 632, 640, 790, 1264, 1280, 1580, 2528, 3160, 4157, 5056, 6320, 8314, 10112, 12640, 16628, 20224, 20785, 25280, 33256, 41570, 50560, 66512, 83140, 101120, 133024, 166280, 266048, 328403, 332560, 532096, 656806, 665120, 1064192, 1313612, 1330240, 1642015, 2627224, 2660480, 3284030, 5254448, 5320960, 6568060, 10508896, 13136120, 21017792, 26272240, 42035584, 52544480, 84071168, 105088960, 210177920, 420355840]

約数ペア:

[(1, 420355840), (2, 210177920), (4, 105088960), (5, 84071168), (8, 52544480), (10, 42035584), (16, 26272240), (20, 21017792), (32, 13136120), (40, 10508896), (64, 6568060), (79, 5320960), (80, 5254448), (128, 3284030), (158, 2660480), (160, 2627224), (256, 1642015), (316, 1330240), (320, 1313612), (395, 1064192), (632, 665120), (640, 656806), (790, 532096), (1264, 332560), (1280, 328403), (1580, 266048), (2528, 166280), (3160, 133024), (4157, 101120), (5056, 83140), (6320, 66512), (8314, 50560), (10112, 41570), (12640, 33256), (16628, 25280), (20224, 20785)]