18720156

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:144

約数の個数: 144

約数和(自身を含む): 57200640

約数和(自身を除く): 38480484

約数列:

[1, 2, 3, 4, 6, 7, 12, 13, 14, 21, 26, 28, 31, 39, 42, 49, 52, 62, 78, 79, 84, 91, 93, 98, 124, 147, 156, 158, 182, 186, 196, 217, 237, 273, 294, 316, 364, 372, 403, 434, 474, 546, 553, 588, 637, 651, 806, 868, 948, 1027, 1092, 1106, 1209, 1274, 1302, 1519, 1612, 1659, 1911, 2054, 2212, 2418, 2449, 2548, 2604, 2821, 3038, 3081, 3318, 3822, 3871, 4108, 4557, 4836, 4898, 5642, 6076, 6162, 6636, 7189, 7347, 7644, 7742, 8463, 9114, 9796, 11284, 11613, 12324, 14378, 14694, 15484, 16926, 17143, 18228, 19747, 21567, 23226, 28756, 29388, 31837, 33852, 34286, 39494, 43134, 46452, 50323, 51429, 59241, 63674, 68572, 78988, 86268, 95511, 100646, 102858, 118482, 120001, 127348, 150969, 191022, 201292, 205716, 222859, 236964, 240002, 301938, 360003, 382044, 445718, 480004, 603876, 668577, 720006, 891436, 1337154, 1440012, 1560013, 2674308, 3120026, 4680039, 6240052, 9360078, 18720156]

約数ペア:

[(1, 18720156), (2, 9360078), (3, 6240052), (4, 4680039), (6, 3120026), (7, 2674308), (12, 1560013), (13, 1440012), (14, 1337154), (21, 891436), (26, 720006), (28, 668577), (31, 603876), (39, 480004), (42, 445718), (49, 382044), (52, 360003), (62, 301938), (78, 240002), (79, 236964), (84, 222859), (91, 205716), (93, 201292), (98, 191022), (124, 150969), (147, 127348), (156, 120001), (158, 118482), (182, 102858), (186, 100646), (196, 95511), (217, 86268), (237, 78988), (273, 68572), (294, 63674), (316, 59241), (364, 51429), (372, 50323), (403, 46452), (434, 43134), (474, 39494), (546, 34286), (553, 33852), (588, 31837), (637, 29388), (651, 28756), (806, 23226), (868, 21567), (948, 19747), (1027, 18228), (1092, 17143), (1106, 16926), (1209, 15484), (1274, 14694), (1302, 14378), (1519, 12324), (1612, 11613), (1659, 11284), (1911, 9796), (2054, 9114), (2212, 8463), (2418, 7742), (2449, 7644), (2548, 7347), (2604, 7189), (2821, 6636), (3038, 6162), (3081, 6076), (3318, 5642), (3822, 4898), (3871, 4836), (4108, 4557)]