21305364

素因数分解:

$2^2\times 3^1\times {\mathrm{53}}^1\times {\mathrm{139}}^1\times {\mathrm{241}}^1$

素因数の和:440

約数の個数: 48

約数和(自身を含む): 51226560

約数和(自身を除く): 29921196

約数列:

[1, 2, 3, 4, 6, 12, 53, 106, 139, 159, 212, 241, 278, 318, 417, 482, 556, 636, 723, 834, 964, 1446, 1668, 2892, 7367, 12773, 14734, 22101, 25546, 29468, 33499, 38319, 44202, 51092, 66998, 76638, 88404, 100497, 133996, 153276, 200994, 401988, 1775447, 3550894, 5326341, 7101788, 10652682, 21305364]

約数ペア:

[(1, 21305364), (2, 10652682), (3, 7101788), (4, 5326341), (6, 3550894), (12, 1775447), (53, 401988), (106, 200994), (139, 153276), (159, 133996), (212, 100497), (241, 88404), (278, 76638), (318, 66998), (417, 51092), (482, 44202), (556, 38319), (636, 33499), (723, 29468), (834, 25546), (964, 22101), (1446, 14734), (1668, 12773), (2892, 7367)]