18400018

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{313}}^1$

素因数の和:371

約数の個数: 64

約数和(自身を含む): 37981440

約数和(自身を除く): 19581422

約数列:

[1, 2, 7, 13, 14, 17, 19, 26, 34, 38, 91, 119, 133, 182, 221, 238, 247, 266, 313, 323, 442, 494, 626, 646, 1547, 1729, 2191, 2261, 3094, 3458, 4069, 4199, 4382, 4522, 5321, 5947, 8138, 8398, 10642, 11894, 28483, 29393, 37247, 41629, 56966, 58786, 69173, 74494, 77311, 83258, 101099, 138346, 154622, 202198, 484211, 541177, 707693, 968422, 1082354, 1314287, 1415386, 2628574, 9200009, 18400018]

約数ペア:

[(1, 18400018), (2, 9200009), (7, 2628574), (13, 1415386), (14, 1314287), (17, 1082354), (19, 968422), (26, 707693), (34, 541177), (38, 484211), (91, 202198), (119, 154622), (133, 138346), (182, 101099), (221, 83258), (238, 77311), (247, 74494), (266, 69173), (313, 58786), (323, 56966), (442, 41629), (494, 37247), (626, 29393), (646, 28483), (1547, 11894), (1729, 10642), (2191, 8398), (2261, 8138), (3094, 5947), (3458, 5321), (4069, 4522), (4199, 4382)]