20802968320

素因数分解:

$2^8\times 5^1\times {\mathrm{1303}}^1\times {\mathrm{12473}}^1$

素因数の和:13797

約数の個数: 72

約数和(自身を含む): 49871850336

約数和(自身を除く): 29068882016

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 1303, 2606, 5212, 6515, 10424, 12473, 13030, 20848, 24946, 26060, 41696, 49892, 52120, 62365, 83392, 99784, 104240, 124730, 166784, 199568, 208480, 249460, 333568, 399136, 416960, 498920, 798272, 833920, 997840, 1596544, 1667840, 1995680, 3193088, 3991360, 7982720, 15965440, 16252319, 32504638, 65009276, 81261595, 130018552, 162523190, 260037104, 325046380, 520074208, 650092760, 1040148416, 1300185520, 2080296832, 2600371040, 4160593664, 5200742080, 10401484160, 20802968320]

約数ペア:

[(1, 20802968320), (2, 10401484160), (4, 5200742080), (5, 4160593664), (8, 2600371040), (10, 2080296832), (16, 1300185520), (20, 1040148416), (32, 650092760), (40, 520074208), (64, 325046380), (80, 260037104), (128, 162523190), (160, 130018552), (256, 81261595), (320, 65009276), (640, 32504638), (1280, 16252319), (1303, 15965440), (2606, 7982720), (5212, 3991360), (6515, 3193088), (10424, 1995680), (12473, 1667840), (13030, 1596544), (20848, 997840), (24946, 833920), (26060, 798272), (41696, 498920), (49892, 416960), (52120, 399136), (62365, 333568), (83392, 249460), (99784, 208480), (104240, 199568), (124730, 166784)]