21285320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{4001}}^1$

素因数の和:4038

約数の個数: 64

約数和(自身を含む): 57628800

約数和(自身を除く): 36343480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 38, 40, 56, 70, 76, 95, 133, 140, 152, 190, 266, 280, 380, 532, 665, 760, 1064, 1330, 2660, 4001, 5320, 8002, 16004, 20005, 28007, 32008, 40010, 56014, 76019, 80020, 112028, 140035, 152038, 160040, 224056, 280070, 304076, 380095, 532133, 560140, 608152, 760190, 1064266, 1120280, 1520380, 2128532, 2660665, 3040760, 4257064, 5321330, 10642660, 21285320]

約数ペア:

[(1, 21285320), (2, 10642660), (4, 5321330), (5, 4257064), (7, 3040760), (8, 2660665), (10, 2128532), (14, 1520380), (19, 1120280), (20, 1064266), (28, 760190), (35, 608152), (38, 560140), (40, 532133), (56, 380095), (70, 304076), (76, 280070), (95, 224056), (133, 160040), (140, 152038), (152, 140035), (190, 112028), (266, 80020), (280, 76019), (380, 56014), (532, 40010), (665, 32008), (760, 28007), (1064, 20005), (1330, 16004), (2660, 8002), (4001, 5320)]