21560028

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{127}}^1$

素因数の和:231

約数の個数: 96

約数和(自身を含む): 60555264

約数和(自身を除く): 38995236

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 43, 47, 84, 86, 94, 127, 129, 141, 172, 188, 254, 258, 282, 301, 329, 381, 508, 516, 564, 602, 658, 762, 889, 903, 987, 1204, 1316, 1524, 1778, 1806, 1974, 2021, 2667, 3556, 3612, 3948, 4042, 5334, 5461, 5969, 6063, 8084, 10668, 10922, 11938, 12126, 14147, 16383, 17907, 21844, 23876, 24252, 28294, 32766, 35814, 38227, 41783, 42441, 56588, 65532, 71628, 76454, 83566, 84882, 114681, 125349, 152908, 167132, 169764, 229362, 250698, 256667, 458724, 501396, 513334, 770001, 1026668, 1540002, 1796669, 3080004, 3593338, 5390007, 7186676, 10780014, 21560028]

約数ペア:

[(1, 21560028), (2, 10780014), (3, 7186676), (4, 5390007), (6, 3593338), (7, 3080004), (12, 1796669), (14, 1540002), (21, 1026668), (28, 770001), (42, 513334), (43, 501396), (47, 458724), (84, 256667), (86, 250698), (94, 229362), (127, 169764), (129, 167132), (141, 152908), (172, 125349), (188, 114681), (254, 84882), (258, 83566), (282, 76454), (301, 71628), (329, 65532), (381, 56588), (508, 42441), (516, 41783), (564, 38227), (602, 35814), (658, 32766), (762, 28294), (889, 24252), (903, 23876), (987, 21844), (1204, 17907), (1316, 16383), (1524, 14147), (1778, 12126), (1806, 11938), (1974, 10922), (2021, 10668), (2667, 8084), (3556, 6063), (3612, 5969), (3948, 5461), (4042, 5334)]