20028400

素因数分解:

$2^4\times 5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{311}}^1$

素因数の和:359

約数の個数: 120

約数和(自身を含む): 57567744

約数和(自身を除く): 37539344

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 25, 28, 35, 40, 46, 50, 56, 70, 80, 92, 100, 112, 115, 140, 161, 175, 184, 200, 230, 280, 311, 322, 350, 368, 400, 460, 560, 575, 622, 644, 700, 805, 920, 1150, 1244, 1288, 1400, 1555, 1610, 1840, 2177, 2300, 2488, 2576, 2800, 3110, 3220, 4025, 4354, 4600, 4976, 6220, 6440, 7153, 7775, 8050, 8708, 9200, 10885, 12440, 12880, 14306, 15550, 16100, 17416, 21770, 24880, 28612, 31100, 32200, 34832, 35765, 43540, 50071, 54425, 57224, 62200, 64400, 71530, 87080, 100142, 108850, 114448, 124400, 143060, 174160, 178825, 200284, 217700, 250355, 286120, 357650, 400568, 435400, 500710, 572240, 715300, 801136, 870800, 1001420, 1251775, 1430600, 2002840, 2503550, 2861200, 4005680, 5007100, 10014200, 20028400]

約数ペア:

[(1, 20028400), (2, 10014200), (4, 5007100), (5, 4005680), (7, 2861200), (8, 2503550), (10, 2002840), (14, 1430600), (16, 1251775), (20, 1001420), (23, 870800), (25, 801136), (28, 715300), (35, 572240), (40, 500710), (46, 435400), (50, 400568), (56, 357650), (70, 286120), (80, 250355), (92, 217700), (100, 200284), (112, 178825), (115, 174160), (140, 143060), (161, 124400), (175, 114448), (184, 108850), (200, 100142), (230, 87080), (280, 71530), (311, 64400), (322, 62200), (350, 57224), (368, 54425), (400, 50071), (460, 43540), (560, 35765), (575, 34832), (622, 32200), (644, 31100), (700, 28612), (805, 24880), (920, 21770), (1150, 17416), (1244, 16100), (1288, 15550), (1400, 14306), (1555, 12880), (1610, 12440), (1840, 10885), (2177, 9200), (2300, 8708), (2488, 8050), (2576, 7775), (2800, 7153), (3110, 6440), (3220, 6220), (4025, 4976), (4354, 4600)]