20867840

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1$

素因数の和:182

約数の個数: 144

約数和(自身を含む): 60927552

約数和(自身を除く): 40059712

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 32, 34, 35, 40, 56, 64, 68, 70, 80, 85, 112, 119, 128, 136, 137, 140, 160, 170, 224, 238, 256, 272, 274, 280, 320, 340, 448, 476, 544, 548, 560, 595, 640, 680, 685, 896, 952, 959, 1088, 1096, 1120, 1190, 1280, 1360, 1370, 1792, 1904, 1918, 2176, 2192, 2240, 2329, 2380, 2720, 2740, 3808, 3836, 4352, 4384, 4480, 4658, 4760, 4795, 5440, 5480, 7616, 7672, 8768, 8960, 9316, 9520, 9590, 10880, 10960, 11645, 15232, 15344, 16303, 17536, 18632, 19040, 19180, 21760, 21920, 23290, 30464, 30688, 32606, 35072, 37264, 38080, 38360, 43840, 46580, 61376, 65212, 74528, 76160, 76720, 81515, 87680, 93160, 122752, 130424, 149056, 152320, 153440, 163030, 175360, 186320, 245504, 260848, 298112, 306880, 326060, 372640, 521696, 596224, 613760, 652120, 745280, 1043392, 1227520, 1304240, 1490560, 2086784, 2608480, 2981120, 4173568, 5216960, 10433920, 20867840]

約数ペア:

[(1, 20867840), (2, 10433920), (4, 5216960), (5, 4173568), (7, 2981120), (8, 2608480), (10, 2086784), (14, 1490560), (16, 1304240), (17, 1227520), (20, 1043392), (28, 745280), (32, 652120), (34, 613760), (35, 596224), (40, 521696), (56, 372640), (64, 326060), (68, 306880), (70, 298112), (80, 260848), (85, 245504), (112, 186320), (119, 175360), (128, 163030), (136, 153440), (137, 152320), (140, 149056), (160, 130424), (170, 122752), (224, 93160), (238, 87680), (256, 81515), (272, 76720), (274, 76160), (280, 74528), (320, 65212), (340, 61376), (448, 46580), (476, 43840), (544, 38360), (548, 38080), (560, 37264), (595, 35072), (640, 32606), (680, 30688), (685, 30464), (896, 23290), (952, 21920), (959, 21760), (1088, 19180), (1096, 19040), (1120, 18632), (1190, 17536), (1280, 16303), (1360, 15344), (1370, 15232), (1792, 11645), (1904, 10960), (1918, 10880), (2176, 9590), (2192, 9520), (2240, 9316), (2329, 8960), (2380, 8768), (2720, 7672), (2740, 7616), (3808, 5480), (3836, 5440), (4352, 4795), (4384, 4760), (4480, 4658)]