20802080

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:238

約数の個数: 96

約数和(自身を含む): 54041904

約数和(自身を除く): 33239824

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 73, 80, 104, 130, 137, 146, 160, 208, 260, 274, 292, 365, 416, 520, 548, 584, 685, 730, 949, 1040, 1096, 1168, 1370, 1460, 1781, 1898, 2080, 2192, 2336, 2740, 2920, 3562, 3796, 4384, 4745, 5480, 5840, 7124, 7592, 8905, 9490, 10001, 10960, 11680, 14248, 15184, 17810, 18980, 20002, 21920, 28496, 30368, 35620, 37960, 40004, 50005, 56992, 71240, 75920, 80008, 100010, 130013, 142480, 151840, 160016, 200020, 260026, 284960, 320032, 400040, 520052, 650065, 800080, 1040104, 1300130, 1600160, 2080208, 2600260, 4160416, 5200520, 10401040, 20802080]

約数ペア:

[(1, 20802080), (2, 10401040), (4, 5200520), (5, 4160416), (8, 2600260), (10, 2080208), (13, 1600160), (16, 1300130), (20, 1040104), (26, 800080), (32, 650065), (40, 520052), (52, 400040), (65, 320032), (73, 284960), (80, 260026), (104, 200020), (130, 160016), (137, 151840), (146, 142480), (160, 130013), (208, 100010), (260, 80008), (274, 75920), (292, 71240), (365, 56992), (416, 50005), (520, 40004), (548, 37960), (584, 35620), (685, 30368), (730, 28496), (949, 21920), (1040, 20002), (1096, 18980), (1168, 17810), (1370, 15184), (1460, 14248), (1781, 11680), (1898, 10960), (2080, 10001), (2192, 9490), (2336, 8905), (2740, 7592), (2920, 7124), (3562, 5840), (3796, 5480), (4384, 4745)]