21292551

素因数分解:

$3^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^2$

素因数の和:130

約数の個数: 60

約数和(自身を含む): 39325968

約数和(自身を除く): 18033417

約数列:

[1, 3, 7, 9, 17, 21, 27, 47, 51, 63, 81, 119, 141, 153, 189, 329, 357, 423, 459, 567, 799, 987, 1071, 1269, 1377, 2209, 2397, 2961, 3213, 3807, 5593, 6627, 7191, 8883, 9639, 15463, 16779, 19881, 21573, 26649, 37553, 46389, 50337, 59643, 64719, 112659, 139167, 151011, 178929, 262871, 337977, 417501, 453033, 788613, 1013931, 1252503, 2365839, 3041793, 7097517, 21292551]

約数ペア:

[(1, 21292551), (3, 7097517), (7, 3041793), (9, 2365839), (17, 1252503), (21, 1013931), (27, 788613), (47, 453033), (51, 417501), (63, 337977), (81, 262871), (119, 178929), (141, 151011), (153, 139167), (189, 112659), (329, 64719), (357, 59643), (423, 50337), (459, 46389), (567, 37553), (799, 26649), (987, 21573), (1071, 19881), (1269, 16779), (1377, 15463), (2209, 9639), (2397, 8883), (2961, 7191), (3213, 6627), (3807, 5593)]