201316520

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{16183}}^1$

素因数の和:16505

約数の個数: 32

約数和(自身を含む): 454446720

約数和(自身を除く): 253130200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1555, 2488, 3110, 6220, 12440, 16183, 32366, 64732, 80915, 129464, 161830, 323660, 647320, 5032913, 10065826, 20131652, 25164565, 40263304, 50329130, 100658260, 201316520]

約数ペア:

[(1, 201316520), (2, 100658260), (4, 50329130), (5, 40263304), (8, 25164565), (10, 20131652), (20, 10065826), (40, 5032913), (311, 647320), (622, 323660), (1244, 161830), (1555, 129464), (2488, 80915), (3110, 64732), (6220, 32366), (12440, 16183)]