21391678

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{8171}}^1$

素因数の和:8208

約数の個数: 32

約数和(自身を含む): 42363648

約数和(自身を除く): 20971970

約数列:

[1, 2, 7, 11, 14, 17, 22, 34, 77, 119, 154, 187, 238, 374, 1309, 2618, 8171, 16342, 57197, 89881, 114394, 138907, 179762, 277814, 629167, 972349, 1258334, 1527977, 1944698, 3055954, 10695839, 21391678]

約数ペア:

[(1, 21391678), (2, 10695839), (7, 3055954), (11, 1944698), (14, 1527977), (17, 1258334), (22, 972349), (34, 629167), (77, 277814), (119, 179762), (154, 138907), (187, 114394), (238, 89881), (374, 57197), (1309, 16342), (2618, 8171)]