21216616

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{1439}}^1$

素因数の和:1561

約数の個数: 32

約数和(自身を含む): 42336000

約数和(自身を除く): 21119384

約数列:

[1, 2, 4, 8, 19, 38, 76, 97, 152, 194, 388, 776, 1439, 1843, 2878, 3686, 5756, 7372, 11512, 14744, 27341, 54682, 109364, 139583, 218728, 279166, 558332, 1116664, 2652077, 5304154, 10608308, 21216616]

約数ペア:

[(1, 21216616), (2, 10608308), (4, 5304154), (8, 2652077), (19, 1116664), (38, 558332), (76, 279166), (97, 218728), (152, 139583), (194, 109364), (388, 54682), (776, 27341), (1439, 14744), (1843, 11512), (2878, 7372), (3686, 5756)]