20003480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{359}}^1$

素因数の和:576

約数の個数: 64

約数和(自身を含む): 51840000

約数和(自身を除く): 31836520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 199, 280, 359, 398, 718, 796, 995, 1393, 1436, 1592, 1795, 1990, 2513, 2786, 2872, 3590, 3980, 5026, 5572, 6965, 7180, 7960, 10052, 11144, 12565, 13930, 14360, 20104, 25130, 27860, 50260, 55720, 71441, 100520, 142882, 285764, 357205, 500087, 571528, 714410, 1000174, 1428820, 2000348, 2500435, 2857640, 4000696, 5000870, 10001740, 20003480]

約数ペア:

[(1, 20003480), (2, 10001740), (4, 5000870), (5, 4000696), (7, 2857640), (8, 2500435), (10, 2000348), (14, 1428820), (20, 1000174), (28, 714410), (35, 571528), (40, 500087), (56, 357205), (70, 285764), (140, 142882), (199, 100520), (280, 71441), (359, 55720), (398, 50260), (718, 27860), (796, 25130), (995, 20104), (1393, 14360), (1436, 13930), (1592, 12565), (1795, 11144), (1990, 10052), (2513, 7960), (2786, 7180), (2872, 6965), (3590, 5572), (3980, 5026)]