644000

素因数分解:

$2^5\times 5^3\times 7^1\times {\mathrm{23}}^1$

素因数の和:55

約数の個数: 96

約数和(自身を含む): 1886976

約数和(自身を除く): 1242976

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 25, 28, 32, 35, 40, 46, 50, 56, 70, 80, 92, 100, 112, 115, 125, 140, 160, 161, 175, 184, 200, 224, 230, 250, 280, 322, 350, 368, 400, 460, 500, 560, 575, 644, 700, 736, 800, 805, 875, 920, 1000, 1120, 1150, 1288, 1400, 1610, 1750, 1840, 2000, 2300, 2576, 2800, 2875, 3220, 3500, 3680, 4000, 4025, 4600, 5152, 5600, 5750, 6440, 7000, 8050, 9200, 11500, 12880, 14000, 16100, 18400, 20125, 23000, 25760, 28000, 32200, 40250, 46000, 64400, 80500, 92000, 128800, 161000, 322000, 644000]

約数ペア:

[(1, 644000), (2, 322000), (4, 161000), (5, 128800), (7, 92000), (8, 80500), (10, 64400), (14, 46000), (16, 40250), (20, 32200), (23, 28000), (25, 25760), (28, 23000), (32, 20125), (35, 18400), (40, 16100), (46, 14000), (50, 12880), (56, 11500), (70, 9200), (80, 8050), (92, 7000), (100, 6440), (112, 5750), (115, 5600), (125, 5152), (140, 4600), (160, 4025), (161, 4000), (175, 3680), (184, 3500), (200, 3220), (224, 2875), (230, 2800), (250, 2576), (280, 2300), (322, 2000), (350, 1840), (368, 1750), (400, 1610), (460, 1400), (500, 1288), (560, 1150), (575, 1120), (644, 1000), (700, 920), (736, 875), (800, 805)]