20891360

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{811}}^1$

素因数の和:856

約数の個数: 96

約数和(自身を含む): 58931712

約数和(自身を除く): 38040352

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 32, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 160, 161, 184, 224, 230, 280, 322, 368, 460, 560, 644, 736, 805, 811, 920, 1120, 1288, 1610, 1622, 1840, 2576, 3220, 3244, 3680, 4055, 5152, 5677, 6440, 6488, 8110, 11354, 12880, 12976, 16220, 18653, 22708, 25760, 25952, 28385, 32440, 37306, 45416, 56770, 64880, 74612, 90832, 93265, 113540, 129760, 130571, 149224, 181664, 186530, 227080, 261142, 298448, 373060, 454160, 522284, 596896, 652855, 746120, 908320, 1044568, 1305710, 1492240, 2089136, 2611420, 2984480, 4178272, 5222840, 10445680, 20891360]

約数ペア:

[(1, 20891360), (2, 10445680), (4, 5222840), (5, 4178272), (7, 2984480), (8, 2611420), (10, 2089136), (14, 1492240), (16, 1305710), (20, 1044568), (23, 908320), (28, 746120), (32, 652855), (35, 596896), (40, 522284), (46, 454160), (56, 373060), (70, 298448), (80, 261142), (92, 227080), (112, 186530), (115, 181664), (140, 149224), (160, 130571), (161, 129760), (184, 113540), (224, 93265), (230, 90832), (280, 74612), (322, 64880), (368, 56770), (460, 45416), (560, 37306), (644, 32440), (736, 28385), (805, 25952), (811, 25760), (920, 22708), (1120, 18653), (1288, 16220), (1610, 12976), (1622, 12880), (1840, 11354), (2576, 8110), (3220, 6488), (3244, 6440), (3680, 5677), (4055, 5152)]