21097804

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{389}}^1$

素因数の和:562

約数の個数: 48

約数和(自身を含む): 45864000

約数和(自身を除く): 24766196

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 149, 182, 298, 364, 389, 596, 778, 1043, 1556, 1937, 2086, 2723, 3874, 4172, 5057, 5446, 7748, 10114, 10892, 13559, 20228, 27118, 35399, 54236, 57961, 70798, 115922, 141596, 231844, 405727, 753493, 811454, 1506986, 1622908, 3013972, 5274451, 10548902, 21097804]

約数ペア:

[(1, 21097804), (2, 10548902), (4, 5274451), (7, 3013972), (13, 1622908), (14, 1506986), (26, 811454), (28, 753493), (52, 405727), (91, 231844), (149, 141596), (182, 115922), (298, 70798), (364, 57961), (389, 54236), (596, 35399), (778, 27118), (1043, 20228), (1556, 13559), (1937, 10892), (2086, 10114), (2723, 7748), (3874, 5446), (4172, 5057)]