18720468

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{181}}^1$

素因数の和:234

約数の個数: 108

約数和(自身を含む): 54555228

約数和(自身を除く): 35834760

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 17, 18, 26, 34, 36, 39, 51, 52, 68, 78, 102, 117, 153, 156, 169, 181, 204, 221, 234, 306, 338, 362, 442, 468, 507, 543, 612, 663, 676, 724, 884, 1014, 1086, 1326, 1521, 1629, 1989, 2028, 2172, 2353, 2652, 2873, 3042, 3077, 3258, 3978, 4706, 5746, 6084, 6154, 6516, 7059, 7956, 8619, 9231, 9412, 11492, 12308, 14118, 17238, 18462, 21177, 25857, 27693, 28236, 30589, 34476, 36924, 40001, 42354, 51714, 55386, 61178, 80002, 84708, 91767, 103428, 110772, 120003, 122356, 160004, 183534, 240006, 275301, 360009, 367068, 480012, 520013, 550602, 720018, 1040026, 1101204, 1440036, 1560039, 2080052, 3120078, 4680117, 6240156, 9360234, 18720468]

約数ペア:

[(1, 18720468), (2, 9360234), (3, 6240156), (4, 4680117), (6, 3120078), (9, 2080052), (12, 1560039), (13, 1440036), (17, 1101204), (18, 1040026), (26, 720018), (34, 550602), (36, 520013), (39, 480012), (51, 367068), (52, 360009), (68, 275301), (78, 240006), (102, 183534), (117, 160004), (153, 122356), (156, 120003), (169, 110772), (181, 103428), (204, 91767), (221, 84708), (234, 80002), (306, 61178), (338, 55386), (362, 51714), (442, 42354), (468, 40001), (507, 36924), (543, 34476), (612, 30589), (663, 28236), (676, 27693), (724, 25857), (884, 21177), (1014, 18462), (1086, 17238), (1326, 14118), (1521, 12308), (1629, 11492), (1989, 9412), (2028, 9231), (2172, 8619), (2353, 7956), (2652, 7059), (2873, 6516), (3042, 6154), (3077, 6084), (3258, 5746), (3978, 4706)]