20319840

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{137}}^1$

素因数の和:261

約数の個数: 144

約数和(自身を含む): 70525728

約数和(自身を除く): 50205888

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 72, 80, 90, 96, 103, 120, 137, 144, 160, 180, 206, 240, 274, 288, 309, 360, 411, 412, 480, 515, 548, 618, 685, 720, 822, 824, 927, 1030, 1096, 1233, 1236, 1370, 1440, 1545, 1644, 1648, 1854, 2055, 2060, 2192, 2466, 2472, 2740, 3090, 3288, 3296, 3708, 4110, 4120, 4384, 4635, 4932, 4944, 5480, 6165, 6180, 6576, 7416, 8220, 8240, 9270, 9864, 9888, 10960, 12330, 12360, 13152, 14111, 14832, 16440, 16480, 18540, 19728, 21920, 24660, 24720, 28222, 29664, 32880, 37080, 39456, 42333, 49320, 49440, 56444, 65760, 70555, 74160, 84666, 98640, 112888, 126999, 141110, 148320, 169332, 197280, 211665, 225776, 253998, 282220, 338664, 423330, 451552, 507996, 564440, 634995, 677328, 846660, 1015992, 1128880, 1269990, 1354656, 1693320, 2031984, 2257760, 2539980, 3386640, 4063968, 5079960, 6773280, 10159920, 20319840]

約数ペア:

[(1, 20319840), (2, 10159920), (3, 6773280), (4, 5079960), (5, 4063968), (6, 3386640), (8, 2539980), (9, 2257760), (10, 2031984), (12, 1693320), (15, 1354656), (16, 1269990), (18, 1128880), (20, 1015992), (24, 846660), (30, 677328), (32, 634995), (36, 564440), (40, 507996), (45, 451552), (48, 423330), (60, 338664), (72, 282220), (80, 253998), (90, 225776), (96, 211665), (103, 197280), (120, 169332), (137, 148320), (144, 141110), (160, 126999), (180, 112888), (206, 98640), (240, 84666), (274, 74160), (288, 70555), (309, 65760), (360, 56444), (411, 49440), (412, 49320), (480, 42333), (515, 39456), (548, 37080), (618, 32880), (685, 29664), (720, 28222), (822, 24720), (824, 24660), (927, 21920), (1030, 19728), (1096, 18540), (1233, 16480), (1236, 16440), (1370, 14832), (1440, 14111), (1545, 13152), (1644, 12360), (1648, 12330), (1854, 10960), (2055, 9888), (2060, 9864), (2192, 9270), (2466, 8240), (2472, 8220), (2740, 7416), (3090, 6576), (3288, 6180), (3296, 6165), (3708, 5480), (4110, 4944), (4120, 4932), (4384, 4635)]