25987840

素因数分解:

$2^8\times 5^1\times {\mathrm{79}}^1\times {\mathrm{257}}^1$

素因数の和:357

約数の個数: 72

約数和(自身を含む): 63282240

約数和(自身を除く): 37294400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 128, 158, 160, 256, 257, 316, 320, 395, 514, 632, 640, 790, 1028, 1264, 1280, 1285, 1580, 2056, 2528, 2570, 3160, 4112, 5056, 5140, 6320, 8224, 10112, 10280, 12640, 16448, 20224, 20303, 20560, 25280, 32896, 40606, 41120, 50560, 65792, 81212, 82240, 101120, 101515, 162424, 164480, 203030, 324848, 328960, 406060, 649696, 812120, 1299392, 1624240, 2598784, 3248480, 5197568, 6496960, 12993920, 25987840]

約数ペア:

[(1, 25987840), (2, 12993920), (4, 6496960), (5, 5197568), (8, 3248480), (10, 2598784), (16, 1624240), (20, 1299392), (32, 812120), (40, 649696), (64, 406060), (79, 328960), (80, 324848), (128, 203030), (158, 164480), (160, 162424), (256, 101515), (257, 101120), (316, 82240), (320, 81212), (395, 65792), (514, 50560), (632, 41120), (640, 40606), (790, 32896), (1028, 25280), (1264, 20560), (1280, 20303), (1285, 20224), (1580, 16448), (2056, 12640), (2528, 10280), (2570, 10112), (3160, 8224), (4112, 6320), (5056, 5140)]