168998540

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{89}}^1\times {\mathrm{263}}^1$

素因数の和:399

約数の個数: 72

約数和(自身を含む): 380207520

約数和(自身を除く): 211208980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 89, 95, 178, 190, 263, 356, 361, 380, 445, 526, 722, 890, 1052, 1315, 1444, 1691, 1780, 1805, 2630, 3382, 3610, 4997, 5260, 6764, 7220, 8455, 9994, 16910, 19988, 23407, 24985, 32129, 33820, 46814, 49970, 64258, 93628, 94943, 99940, 117035, 128516, 160645, 189886, 234070, 321290, 379772, 444733, 468140, 474715, 642580, 889466, 949430, 1778932, 1898860, 2223665, 4447330, 8449927, 8894660, 16899854, 33799708, 42249635, 84499270, 168998540]

約数ペア:

[(1, 168998540), (2, 84499270), (4, 42249635), (5, 33799708), (10, 16899854), (19, 8894660), (20, 8449927), (38, 4447330), (76, 2223665), (89, 1898860), (95, 1778932), (178, 949430), (190, 889466), (263, 642580), (356, 474715), (361, 468140), (380, 444733), (445, 379772), (526, 321290), (722, 234070), (890, 189886), (1052, 160645), (1315, 128516), (1444, 117035), (1691, 99940), (1780, 94943), (1805, 93628), (2630, 64258), (3382, 49970), (3610, 46814), (4997, 33820), (5260, 32129), (6764, 24985), (7220, 23407), (8455, 19988), (9994, 16910)]