20813040

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{211}}^1$

素因数の和:367

約数の個数: 120

約数和(自身を含む): 70741008

約数和(自身を除く): 49927968

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 137, 144, 180, 211, 240, 274, 360, 411, 422, 548, 633, 685, 720, 822, 844, 1055, 1096, 1233, 1266, 1370, 1644, 1688, 1899, 2055, 2110, 2192, 2466, 2532, 2740, 3165, 3288, 3376, 3798, 4110, 4220, 4932, 5064, 5480, 6165, 6330, 6576, 7596, 8220, 8440, 9495, 9864, 10128, 10960, 12330, 12660, 15192, 16440, 16880, 18990, 19728, 24660, 25320, 28907, 30384, 32880, 37980, 49320, 50640, 57814, 75960, 86721, 98640, 115628, 144535, 151920, 173442, 231256, 260163, 289070, 346884, 433605, 462512, 520326, 578140, 693768, 867210, 1040652, 1156280, 1300815, 1387536, 1734420, 2081304, 2312560, 2601630, 3468840, 4162608, 5203260, 6937680, 10406520, 20813040]

約数ペア:

[(1, 20813040), (2, 10406520), (3, 6937680), (4, 5203260), (5, 4162608), (6, 3468840), (8, 2601630), (9, 2312560), (10, 2081304), (12, 1734420), (15, 1387536), (16, 1300815), (18, 1156280), (20, 1040652), (24, 867210), (30, 693768), (36, 578140), (40, 520326), (45, 462512), (48, 433605), (60, 346884), (72, 289070), (80, 260163), (90, 231256), (120, 173442), (137, 151920), (144, 144535), (180, 115628), (211, 98640), (240, 86721), (274, 75960), (360, 57814), (411, 50640), (422, 49320), (548, 37980), (633, 32880), (685, 30384), (720, 28907), (822, 25320), (844, 24660), (1055, 19728), (1096, 18990), (1233, 16880), (1266, 16440), (1370, 15192), (1644, 12660), (1688, 12330), (1899, 10960), (2055, 10128), (2110, 9864), (2192, 9495), (2466, 8440), (2532, 8220), (2740, 7596), (3165, 6576), (3288, 6330), (3376, 6165), (3798, 5480), (4110, 5064), (4220, 4932)]