21485655220

素因数分解:

$2^2\times 5^1\times {\mathrm{251}}^1\times {\mathrm{4280011}}^1$

素因数の和:4280271

約数の個数: 24

約数和(自身を含む): 45299647008

約数和(自身を除く): 23813991788

約数列:

[1, 2, 4, 5, 10, 20, 251, 502, 1004, 1255, 2510, 5020, 4280011, 8560022, 17120044, 21400055, 42800110, 85600220, 1074282761, 2148565522, 4297131044, 5371413805, 10742827610, 21485655220]

約数ペア:

[(1, 21485655220), (2, 10742827610), (4, 5371413805), (5, 4297131044), (10, 2148565522), (20, 1074282761), (251, 85600220), (502, 42800110), (1004, 21400055), (1255, 17120044), (2510, 8560022), (5020, 4280011)]