20168998420

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1\times {\mathrm{337}}^1\times {\mathrm{431}}^1$

素因数の和:961

約数の個数: 96

約数和(自身を含む): 43713686016

約数和(自身を除く): 23544687596

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 131, 212, 262, 265, 337, 431, 524, 530, 655, 674, 862, 1060, 1310, 1348, 1685, 1724, 2155, 2620, 3370, 4310, 6740, 6943, 8620, 13886, 17861, 22843, 27772, 34715, 35722, 44147, 45686, 56461, 69430, 71444, 88294, 89305, 91372, 112922, 114215, 138860, 145247, 176588, 178610, 220735, 225844, 228430, 282305, 290494, 357220, 441470, 456860, 564610, 580988, 726235, 882940, 1129220, 1452470, 2339791, 2904940, 2992433, 4679582, 5984866, 7698091, 9359164, 11698955, 11969732, 14962165, 15396182, 19027357, 23397910, 29924330, 30792364, 38054714, 38490455, 46795820, 59848660, 76109428, 76980910, 95136785, 153961820, 190273570, 380547140, 1008449921, 2016899842, 4033799684, 5042249605, 10084499210, 20168998420]

約数ペア:

[(1, 20168998420), (2, 10084499210), (4, 5042249605), (5, 4033799684), (10, 2016899842), (20, 1008449921), (53, 380547140), (106, 190273570), (131, 153961820), (212, 95136785), (262, 76980910), (265, 76109428), (337, 59848660), (431, 46795820), (524, 38490455), (530, 38054714), (655, 30792364), (674, 29924330), (862, 23397910), (1060, 19027357), (1310, 15396182), (1348, 14962165), (1685, 11969732), (1724, 11698955), (2155, 9359164), (2620, 7698091), (3370, 5984866), (4310, 4679582), (6740, 2992433), (6943, 2904940), (8620, 2339791), (13886, 1452470), (17861, 1129220), (22843, 882940), (27772, 726235), (34715, 580988), (35722, 564610), (44147, 456860), (45686, 441470), (56461, 357220), (69430, 290494), (71444, 282305), (88294, 228430), (89305, 225844), (91372, 220735), (112922, 178610), (114215, 176588), (138860, 145247)]