254207780

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{251}}^1\times {\mathrm{641}}^1$

素因数の和:980

約数の個数: 48

約数和(自身を含む): 543594240

約数和(自身を除く): 289386460

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 251, 316, 395, 502, 641, 790, 1004, 1255, 1282, 1580, 2510, 2564, 3205, 5020, 6410, 12820, 19829, 39658, 50639, 79316, 99145, 101278, 160891, 198290, 202556, 253195, 321782, 396580, 506390, 643564, 804455, 1012780, 1608910, 3217820, 12710389, 25420778, 50841556, 63551945, 127103890, 254207780]

約数ペア:

[(1, 254207780), (2, 127103890), (4, 63551945), (5, 50841556), (10, 25420778), (20, 12710389), (79, 3217820), (158, 1608910), (251, 1012780), (316, 804455), (395, 643564), (502, 506390), (641, 396580), (790, 321782), (1004, 253195), (1255, 202556), (1282, 198290), (1580, 160891), (2510, 101278), (2564, 99145), (3205, 79316), (5020, 50639), (6410, 39658), (12820, 19829)]