638545540

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{829}}^1\times {\mathrm{2027}}^1$

素因数の和:2884

約数の個数: 48

約数和(自身を含む): 1413921600

約数和(自身を除く): 775376060

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 829, 1658, 2027, 3316, 4054, 4145, 8108, 8290, 10135, 15751, 16580, 20270, 31502, 38513, 40540, 63004, 77026, 78755, 154052, 157510, 192565, 315020, 385130, 770260, 1680383, 3360766, 6721532, 8401915, 16803830, 31927277, 33607660, 63854554, 127709108, 159636385, 319272770, 638545540]

約数ペア:

[(1, 638545540), (2, 319272770), (4, 159636385), (5, 127709108), (10, 63854554), (19, 33607660), (20, 31927277), (38, 16803830), (76, 8401915), (95, 6721532), (190, 3360766), (380, 1680383), (829, 770260), (1658, 385130), (2027, 315020), (3316, 192565), (4054, 157510), (4145, 154052), (8108, 78755), (8290, 77026), (10135, 63004), (15751, 40540), (16580, 38513), (20270, 31502)]