21291296

素因数分解:

$2^5\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{127}}^1$

素因数の和:194

約数の個数: 72

約数和(自身を含む): 47222784

約数和(自身を除く): 25931488

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 32, 52, 62, 104, 124, 127, 169, 208, 248, 254, 338, 403, 416, 496, 508, 676, 806, 992, 1016, 1352, 1612, 1651, 2032, 2704, 3224, 3302, 3937, 4064, 5239, 5408, 6448, 6604, 7874, 10478, 12896, 13208, 15748, 20956, 21463, 26416, 31496, 41912, 42926, 51181, 52832, 62992, 83824, 85852, 102362, 125984, 167648, 171704, 204724, 343408, 409448, 665353, 686816, 818896, 1330706, 1637792, 2661412, 5322824, 10645648, 21291296]

約数ペア:

[(1, 21291296), (2, 10645648), (4, 5322824), (8, 2661412), (13, 1637792), (16, 1330706), (26, 818896), (31, 686816), (32, 665353), (52, 409448), (62, 343408), (104, 204724), (124, 171704), (127, 167648), (169, 125984), (208, 102362), (248, 85852), (254, 83824), (338, 62992), (403, 52832), (416, 51181), (496, 42926), (508, 41912), (676, 31496), (806, 26416), (992, 21463), (1016, 20956), (1352, 15748), (1612, 13208), (1651, 12896), (2032, 10478), (2704, 7874), (3224, 6604), (3302, 6448), (3937, 5408), (4064, 5239)]