18708417

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{431}}^1$

素因数の和:510

約数の個数: 48

約数和(自身を含む): 33965568

約数和(自身を除く): 15257151

約数列:

[1, 3, 7, 9, 13, 21, 39, 53, 63, 91, 117, 159, 273, 371, 431, 477, 689, 819, 1113, 1293, 2067, 3017, 3339, 3879, 4823, 5603, 6201, 9051, 14469, 16809, 22843, 27153, 39221, 43407, 50427, 68529, 117663, 159901, 205587, 296959, 352989, 479703, 890877, 1439109, 2078713, 2672631, 6236139, 18708417]

約数ペア:

[(1, 18708417), (3, 6236139), (7, 2672631), (9, 2078713), (13, 1439109), (21, 890877), (39, 479703), (53, 352989), (63, 296959), (91, 205587), (117, 159901), (159, 117663), (273, 68529), (371, 50427), (431, 43407), (477, 39221), (689, 27153), (819, 22843), (1113, 16809), (1293, 14469), (2067, 9051), (3017, 6201), (3339, 5603), (3879, 4823)]