21815332

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{47}}^1\times {\mathrm{137}}^1$

素因数の和:217

約数の個数: 72

約数和(自身を含む): 49335552

約数和(自身を除く): 27520220

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 47, 77, 94, 121, 137, 154, 188, 242, 274, 308, 329, 484, 517, 548, 658, 847, 959, 1034, 1316, 1507, 1694, 1918, 2068, 3014, 3388, 3619, 3836, 5687, 6028, 6439, 7238, 10549, 11374, 12878, 14476, 16577, 21098, 22748, 25756, 33154, 39809, 42196, 45073, 66308, 70829, 79618, 90146, 116039, 141658, 159236, 180292, 232078, 283316, 464156, 495803, 779119, 991606, 1558238, 1983212, 3116476, 5453833, 10907666, 21815332]

約数ペア:

[(1, 21815332), (2, 10907666), (4, 5453833), (7, 3116476), (11, 1983212), (14, 1558238), (22, 991606), (28, 779119), (44, 495803), (47, 464156), (77, 283316), (94, 232078), (121, 180292), (137, 159236), (154, 141658), (188, 116039), (242, 90146), (274, 79618), (308, 70829), (329, 66308), (484, 45073), (517, 42196), (548, 39809), (658, 33154), (847, 25756), (959, 22748), (1034, 21098), (1316, 16577), (1507, 14476), (1694, 12878), (1918, 11374), (2068, 10549), (3014, 7238), (3388, 6439), (3619, 6028), (3836, 5687)]