21539540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{5153}}^1$

素因数の和:5192

約数の個数: 48

約数和(自身を含む): 51952320

約数和(自身を除く): 30412780

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 4180, 5153, 10306, 20612, 25765, 51530, 56683, 97907, 103060, 113366, 195814, 226732, 283415, 391628, 489535, 566830, 979070, 1076977, 1133660, 1958140, 2153954, 4307908, 5384885, 10769770, 21539540]

約数ペア:

[(1, 21539540), (2, 10769770), (4, 5384885), (5, 4307908), (10, 2153954), (11, 1958140), (19, 1133660), (20, 1076977), (22, 979070), (38, 566830), (44, 489535), (55, 391628), (76, 283415), (95, 226732), (110, 195814), (190, 113366), (209, 103060), (220, 97907), (380, 56683), (418, 51530), (836, 25765), (1045, 20612), (2090, 10306), (4180, 5153)]