19927856

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{643}}^1$

素因数の和:813

約数の個数: 40

約数和(自身を含む): 41924400

約数和(自身を除く): 21996544

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 149, 208, 298, 596, 643, 1192, 1286, 1937, 2384, 2572, 3874, 5144, 7748, 8359, 10288, 15496, 16718, 30992, 33436, 66872, 95807, 133744, 191614, 383228, 766456, 1245491, 1532912, 2490982, 4981964, 9963928, 19927856]

約数ペア:

[(1, 19927856), (2, 9963928), (4, 4981964), (8, 2490982), (13, 1532912), (16, 1245491), (26, 766456), (52, 383228), (104, 191614), (149, 133744), (208, 95807), (298, 66872), (596, 33436), (643, 30992), (1192, 16718), (1286, 15496), (1937, 10288), (2384, 8359), (2572, 7748), (3874, 5144)]